Starting to Pump While Exclusively Breastfeeding: Your Essential Guide

Posted on January 12, 2026

Introduction
Why Pumping Matters: Supporting Your Breastfeeding Journey
Timing is Everything: When to Start Your Pumping Journey
Setting Yourself Up for Pumping Success
Building Your Stash: Storing and Preparing Breast Milk
Pumping and Returning to Work/School
Boosting Your Supply: When You Need a Little Extra Help
Common Pumping Challenges and Solutions
Milky Mama Support: You're Not Alone
FAQ
Ready to Embrace Your Pumping Journey?

Introduction

The gentle hum of a breast pump. For many exclusively breastfeeding moms, this sound might initially feel like a foreign concept. You’ve mastered the art of direct nursing, formed a deep bond with your baby at the breast, and found your rhythm. So, why introduce a pump now? Perhaps you’re planning a return to work or school, anticipating a short separation from your little one, or maybe you're navigating challenges like a tricky latch or concerns about your milk supply. Whatever your reason, the decision to incorporate pumping into your established breastfeeding routine can feel like a big step, often accompanied by questions, excitement, and a touch of overwhelm.

But here’s the wonderful truth: adding pumping to your journey doesn't diminish your breastfeeding bond; it often strengthens it by providing flexibility, peace of mind, and the ability to continue offering your precious breast milk even when you can't be physically present. We understand that every breastfeeding journey is unique, and ours is to offer you compassionate, empowering support without judgment or pressure. You're doing an amazing job, and we're here to help you navigate this new chapter with confidence.

This comprehensive guide will walk you through everything you need to know about starting to pump while exclusively breastfeeding. We’ll cover when and why to begin, practical tips for choosing and using your pump, strategies for building a milk stash, and how to balance pumping with direct nursing. Our goal is to empower you with the knowledge and tools to seamlessly integrate pumping into your life, ensuring that your baby continues to receive every drop of nourishment they need, while also prioritizing your well-being.

Why Pumping Matters: Supporting Your Breastfeeding Journey

Even when exclusively breastfeeding, there are many reasons why pumping becomes a valuable tool for moms. Understanding these motivations can help you determine the best path forward for your family.

When Baby and Mama Are Separated

Life happens, and sometimes you and your baby might need to be apart. This could be due to:

Medical Needs: If your baby requires a stay in the NICU or has other medical conditions that prevent direct nursing, pumping is essential for establishing and maintaining your milk supply. In these situations, your care team, including nurses and lactation consultants, will be invaluable in guiding you through early pumping.
Returning to Work or School: For many moms, the most common reason to start pumping is to provide breast milk for their baby while they are away. This allows your baby to continue receiving the amazing benefits of your milk, even when you can't be there to nurse directly.
Time Away for Self-Care: Whether it's a doctor's appointment, a much-needed break, or simply wanting to share feeding responsibilities with a partner, pumping provides the flexibility to step away while ensuring your baby's needs are met. Remember, your well-being matters too!

Addressing Latch Challenges

Sometimes, a baby may have difficulty latching effectively, leading to nipple soreness for mom or insufficient milk transfer for baby. Pumping can be a crucial support tool in these instances:

Building Supply While Baby Learns: If your baby is having trouble with their latch, pumping can stimulate your breasts to build and maintain your milk supply. This ensures your baby receives enough milk, which can be given by spoon, cup, or bottle, while they are learning to latch properly.
Protecting Your Nipples: Pumping can give your nipples a much-needed break from a painful or inefficient latch, allowing them to heal while you work with a lactation consultant to improve your baby's latch technique.
Encouraging Milk Flow: For babies with a weak suck or those who are sleepy, pumping can help initiate a letdown, making it easier for them to latch onto a fuller breast once your milk is flowing.

Supporting Your Milk Supply

Even with exclusive direct nursing, some moms worry about their milk supply. Pumping can be an effective strategy to:

Increase Overall Supply: The principle of "supply and demand" is fundamental to breast milk production. The more milk that is removed from your breasts, the more your body will produce. Pumping after or between nursing sessions tells your body to make more milk.
Manage Engorgement: If your breasts become uncomfortably full between feedings, expressing a small amount of milk with a pump or by hand can provide relief and prevent issues like clogged ducts.
Maintain Supply During Growth Spurts: When your baby goes through a growth spurt, they may cluster feed, nursing more frequently to signal your body to increase supply. If you're separated from your baby during this time, or if you feel your supply isn't keeping up, pumping can mimic this demand.

No matter your reason, adding pumping is a valid, powerful way to continue providing your baby with the best nourishment. You're adapting, evolving, and doing what's best for your family, and that's truly commendable.

Timing is Everything: When to Start Your Pumping Journey

Deciding when to introduce a pump can feel a bit like a puzzle piece fitting into the beautiful chaos of new parenthood. There's no single "right" answer that applies to everyone, but understanding general guidelines and exceptions can help you make an informed choice for your unique situation.

The First Few Weeks: Establishing Supply and Bond

For many exclusively breastfeeding moms, especially those whose babies are healthy, full-term, and latching well, the recommendation is often to wait until breastfeeding is well-established, typically around four to six weeks postpartum, before regularly introducing a pump.

Why this waiting period?

Regulating Supply: Your body is learning how much milk your baby needs. In these early weeks, frequent direct nursing helps to "regulate" your milk supply, meaning your body starts to produce just the right amount of milk to meet your baby's demand. Introducing a pump too early can sometimes overstimulate your supply, leading to engorgement or an oversupply that can be challenging to manage.
Bonding and Latch: The initial weeks are a precious time for you and your baby to learn the dance of breastfeeding. It's a period of intense skin-to-skin contact, learning your baby's hunger cues, and perfecting their latch. Focusing on direct nursing helps solidify this bond and ensures your baby becomes proficient at the breast without potential nipple confusion from a pump or bottle.

During this initial phase, your baby is nursing anywhere from 8 to 12 times a day, sometimes more during growth spurts. This frequent, on-demand nursing is the most effective way to tell your body to produce milk. Think of it as laying the foundation for a strong, resilient milk supply.

When Early Pumping is Necessary

While waiting is often recommended, there are crucial situations where starting to pump much earlier – sometimes immediately after birth – is not just beneficial, but essential.

NICU Stays or Medical Separations: If your baby is born prematurely, requires a stay in the Neonatal Intensive Care Unit (NICU), or has medical complications that prevent them from nursing directly, early pumping is vital. In these cases, initiating pumping as soon as possible after birth (ideally within the first six hours) helps to kickstart your milk production and establish a robust supply. You'll likely use a hospital-grade pump and be guided by the medical team and lactation consultants on frequency and duration.
Latching Difficulties or Low Supply Concerns: If your baby is having significant trouble latching, isn't transferring milk effectively, or if you have concerns about low milk supply, a lactation consultant may recommend early pumping. This ensures your baby receives adequate nutrition while working on latch improvement, and it provides the necessary stimulation to build your supply. Expressed milk can then be given via alternative methods like a spoon, cup, or syringe.
Engorgement Relief: In the first few days and weeks, some moms experience significant engorgement as their milk "comes in." While direct nursing is the best solution, if your breasts are too full for your baby to latch, gentle hand expression or a brief pumping session (just enough to soften the nipple area) can provide relief and help your baby latch more easily. Our virtual lactation consultations can offer personalized guidance on managing engorgement effectively.

If you find yourself in a situation where early pumping is necessary, please know that you are still providing incredible nourishment for your baby, and you are not alone. Seeking support from an International Board Certified Lactation Consultant (IBCLC) is always a smart next step to tailor a pumping plan to your specific needs.

Setting Yourself Up for Pumping Success

Once you've decided when to start, preparing your tools and understanding the mechanics will make your pumping journey smoother and more effective.

Choosing Your Pump and Gear

Not all pumps are created equal, and having the right equipment can make a world of difference.

Double Electric Pumps: For moms who plan to pump regularly, especially if returning to work or building a substantial stash, a high-quality double electric breast pump is usually recommended. These pumps allow you to express milk from both breasts simultaneously, significantly reducing pumping time and often yielding more milk due to bilateral stimulation. Look for models with "two-phase technology," which mimics a baby's feeding pattern by starting with a faster, lighter suction (letdown or massage mode) and then transitioning to a slower, deeper suction (expression mode) once your milk begins to flow.
Manual Pumps: A manual pump can be a great portable option for occasional use, such as relieving engorgement on the go or catching letdown from one breast while your baby nurses on the other. However, they are generally not sufficient for maintaining a full milk supply for regular, sustained pumping.
Flange Sizing is Crucial: This is one of the most overlooked, yet vital, aspects of comfortable and effective pumping. The flange (also called a breast shield) is the part that fits over your nipple and areola. If it's too small, it can pinch your nipple, cause pain, and prevent full milk removal. If it's too large, it can pull too much of your areola into the tunnel, leading to discomfort and inefficient pumping.
- How to check: Your nipple should fit comfortably in the center of the flange tunnel and move freely back and forth without rubbing the sides. Only a small amount of areola should be drawn into the tunnel.
- Factors to consider: Nipple elasticity, nipple size (which can change over time, and each nipple might even be a different size!), and pump brand can all influence the correct flange size.
- When in doubt: Connect with a lactation consultant who can assess your flange fit and recommend the best size for you. An incorrect flange size can lead to pain, nipple damage, and decreased milk production, so it's worth getting it right!

Finding Your Pumping Rhythm: Schedule and Frequency

Your body operates on a principle of supply and demand. To maintain your milk supply while exclusively breastfeeding and pumping, you need to mimic your baby's natural feeding patterns as closely as possible.

The "Robot Baby" Concept: Think of your pump as your "robot baby." When your actual baby is nursing, their demand signals your body to produce milk. When your baby isn't nursing, your pump needs to send that same signal. This means if you're away from your baby, you should pump at the times your baby would typically nurse.
Frequency is Key: For most moms, this translates to pumping every 2.5 to 3 hours, or at least 8-10 times in a 24-hour period, especially if you're aiming to build or maintain a full supply. Consistency is paramount. Missing one or two sessions might leave you feeling uncomfortable, but consistent skipping over time will decrease your milk production.
Pumping Duration: Aim for 15-20 minutes per pumping session, or until your breasts feel soft and well-emptied. Remember, you're never truly "empty" – your breasts are always making milk! The goal is to send the signal for continuous production.
Integrating Pumping with Nursing: If you're still primarily nursing, you can add pumping sessions after a nursing session (to collect "leftovers" and signal for more production) or between nursing sessions. Many moms find the morning is often the most productive time to pump, as supply tends to be higher. Start with one session a day and gradually increase as needed.

Mastering the Art of Pumping

Pumping is a skill that takes practice. Here are some tips to optimize your output and comfort:

Relaxation is Your Friend: Stress and tension can inhibit your letdown reflex. Find a comfortable, private spot. Look at pictures of your baby, listen to calming music, or simply take deep breaths. Some moms even find that covering the collection bottles with a sock helps prevent watching the milk flow, which can sometimes be counterproductive if you're feeling anxious about output.
Two-Phase Pumping: As mentioned, most electric pumps have a letdown (or massage) mode and an expression mode. Start with the faster, lighter suction to stimulate a letdown. Once your milk starts flowing, switch to the slower, deeper suction. You can cycle between these modes if your milk flow slows down.
Comfort Over Maximum Suction: Pumping should not hurt. While you want effective suction, turning it up to the highest setting can damage your nipples and inhibit milk flow. Find the highest comfortable suction level.
Hands-On Pumping: Gentle breast massage and compression during pumping can significantly improve milk output and ensure more complete emptying of the breast. As you pump, gently massage your breast from the chest wall towards the nipple. When the milk flow slows, compress your breast to help express more milk.
Hydration and Nutrition: Breast milk is primarily water! Stay well-hydrated throughout the day. Keep a water bottle handy while you pump and nurse. Also, ensure you're eating nourishing, balanced meals. While no specific food guarantees a massive supply increase, a well-nourished body functions optimally. Our lactation drinks like Pumpin Punch™, Milky Melon™, and Lactation LeMOOnade™ are delicious ways to support both hydration and lactation!

Building Your Stash: Storing and Preparing Breast Milk

Once you've mastered the pumping technique, you'll start collecting that liquid gold. Knowing how to safely store and prepare it is just as important.

Safe Storage Guidelines

Proper handling and storage of breast milk ensure its safety and preserves its nutritional and immunological properties.

Room Temperature: Freshly expressed breast milk can be stored at room temperature (up to 77°F or 25°C) for up to 4 hours.
Refrigerated: In the refrigerator (39°F or 4°C), breast milk is good for up to 4 days. Store it in the back, where the temperature is most consistent, not in the door.
Frozen: In a freezer (0°F or -18°C), breast milk can be stored for 6 months, and ideally up to 12 months in a deep freezer.
Storage Containers: Use clean, food-grade breast milk storage bags or hard plastic containers with tight-fitting lids.
Labeling: Always label your containers with the date and amount. If your baby is in daycare, adding their name can also be helpful.
Combining Milk: You can combine milk from different pumping sessions within a 24-hour period, as long as the freshly expressed milk is chilled in the refrigerator before adding it to previously cooled milk. Do not add warm milk to cold or frozen milk.

Introducing the Bottle to Your Breastfed Baby

Introducing a bottle to an exclusively breastfed baby often requires a bit of patience and strategy.

Timing is Key: Once breastfeeding is well-established (around 4-6 weeks), you can begin introducing a bottle. Don't wait until the day before you return to work, as some babies need practice! Aim for at least 2-3 weeks of practice before a major transition.
Who Should Offer the Bottle? Often, babies are more likely to accept a bottle from someone other than their breastfeeding parent. Your baby associates you with the breast, so having another trusted caregiver (partner, grandparent, babysitter) offer the first few bottles can be very helpful. It might even help if you're not in the room.
Pace Feeding: This method mimics breastfeeding by allowing the baby to control the flow of milk, preventing overfeeding and promoting a slower, more deliberate feed.
- Hold the baby in an upright, almost sitting position.
- Hold the bottle horizontally, just tilting it enough to fill the nipple, allowing the baby to draw milk out, rather than gravity doing the work.
- Use a slow-flow nipple.
- Offer frequent breaks, allowing the baby to pause and take a breath.
- Tickle the baby's mouth to encourage a wide latch onto the bottle nipple.
Temperature Matters: While most babies aren't too picky, some prefer milk warmed to body temperature. You can warm milk by placing the bottle in a bowl of warm water or using a bottle warmer. Never microwave breast milk, as it can create hot spots and destroy nutrients.
Mom's Scent: Some caregivers find that having an article of your worn clothing (like a t-shirt or nightgown) near the baby during bottle feeding can provide comfort and familiarity with your scent, making the transition smoother.

Every Drop Counts: Building a Freezer Stash Without Stress

Many new moms feel immense pressure to build a huge freezer stash of breast milk. While having a reserve is helpful, it's truly not necessary to have months' worth of milk.

Realistic Goals: If you're returning to work, you generally only need enough milk for a few days' worth of feedings. Your daily pumping at work will provide the milk for the next day, creating a "rolling" supply.
Focus on Consistency: Instead of aiming for a massive volume, focus on consistent, effective pumping to maintain your daily supply.
Small Amounts Add Up: Even small amounts of "leftover" milk collected after nursing, or a few ounces from a dedicated pumping session, will add up over time. Remember, every drop counts!
Nourish Yourself: Building and maintaining a milk supply requires energy. Support your body with nutrient-rich foods and plenty of liquids. Our lactation treats like Emergency Brownies, Oatmeal Chocolate Chip Cookies, and Peanut Butter Chocolate Chip Cookies are a delicious way to do just that – offering a boost of galactagogues in a convenient and tasty format!

Pumping and Returning to Work/School

Returning to work or school is a significant transition for breastfeeding moms. With thoughtful planning and a little advocacy, you can successfully continue your breastfeeding journey.

Planning Ahead: Workplace Rights and Logistics

Longest Leave Possible: If available and feasible, consider taking the longest maternity leave you can. This gives you more time to establish your milk supply and your baby more time to become proficient at nursing and bottle-feeding.
Flexible Work Arrangements: Explore options like working part-time, job sharing, or gradually returning to a full schedule. Some mothers find that when they factor in childcare costs, reducing work hours makes financial sense.
Know Your Rights (USA): In the United States, the federal PUMP for Nursing Mothers Act provides protections for most employees to have reasonable break time and a private, non-bathroom place to pump at work for up to one year after childbirth. This means employers must provide:
- Reasonable Break Time: As often as needed.
- Private Pumping Space: A room or location (other than a bathroom) that is shielded from view and free from intrusion from coworkers and the public. It must be functional for expressing milk (e.g., with a place to sit, a surface for the pump, and an electrical outlet).
- Check Section 4207 of the Patient Protection and Affordable Care Act (ACA) for further details. Resources like the Office of Women's Health also provide valuable information.
International Considerations: While legal protections vary by country (e.g., specific entitlements in Ireland and recommendations in the UK), the spirit of supporting breastfeeding employees is growing globally. Check your local regulations and resources like "Breastfeeding and Work: Your rights at work" for Australia, or http://www.citizensinformation.ie/ for Ireland, and the Health and Safety Executive for the UK.
Workplace Facilities: Before your return, become familiar with your workplace's pumping facilities.
- Is there a dedicated lactation room? Is it private, lockable, and comfortable?
- Is there a sign-up sheet if sharing the space?
- Is refrigeration available for milk storage, or will you need to bring your own insulated cooler with ice packs?

Advocating for Your Pumping Needs

If your company doesn't fall under specific legal rulings, or if facilities are less than ideal, you can still advocate for your needs.

Proactive Communication: Meet with your manager and HR department while you're still pregnant or on maternity leave to discuss your pumping plan. Present it as a wellness initiative that benefits both you and the company.
Highlight the Benefits: Explain how supporting your breastfeeding journey can lead to:
- Reduced Absenteeism: Breastfed babies tend to be healthier, meaning fewer sick days for you to care for a sick child.
- Improved Employee Morale and Retention: Support for working parents fosters job satisfaction and loyalty.
- Positive Company Image: Demonstrating support for employees' family needs enhances the company's reputation.
Creative Solutions: If a dedicated room isn't possible, consider alternatives:
- Pumping in your car using a vehicle adapter or battery pack.
- Using a discreet nursing cover if privacy is limited (fun fact: breastfeeding in public — covered or uncovered — is legal in all 50 states, and this often extends to pumping too!).
- Bringing a screen or room divider if privacy is the main concern in a shared space.

Remember, you have a right to provide breast milk for your baby, and your employer has a vested interest in supporting your successful return. Approach these conversations confidently, armed with information and solutions.

Boosting Your Supply: When You Need a Little Extra Help

Sometimes, despite consistent pumping and nursing, you might feel your milk supply could use a boost. This is a common concern, and there are several strategies that can help.

Power Pumping Explained

Power pumping is a technique designed to mimic a baby's cluster feeding patterns – those periods when babies nurse very frequently for short bursts. This intense demand signals your body to increase milk production. It's an excellent short-term tool to try if you're looking to increase your supply, but not typically a long-term practice.

The Schedule: A typical power pumping session lasts for one hour, once a day, following this pattern:
- Pump for 20 minutes
- Rest for 10 minutes
- Pump for 10 minutes
- Rest for 10 minutes
- Pump for 10 minutes
Patience is Key: You may not see a significant increase in milk during the power pumping session itself, and it can take a few days of consistent power pumping to notice a difference in your overall supply. The goal isn't immediate volume, but to send a strong message to your body to produce more milk over time.
When to Power Pump: Power pumping can be particularly effective during growth spurts, if you've had a dip in supply, or as you're trying to build a stash. However, if you're already producing enough milk for your baby, there's no need to power pump.

Nourishment for Your Journey

While the core of increasing milk supply lies in consistent and effective milk removal, many moms find additional support from carefully formulated lactation supplements and nourishing treats. We offer a range of products designed with breastfeeding moms in mind, providing convenient and delicious ways to support your lactation journey.

Lactation Supplements: Our herbal blends are crafted to support milk production. Options like Lady Leche™, Dairy Duchess™, Pumping Queen™, Milk Goddess™, Milky Maiden™, and Pump Hero™ are popular choices, each with unique formulations to address different needs. It's always a good idea to consult with your healthcare provider or a lactation consultant before starting any new supplement to ensure it's right for you.
- Disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.
Lactation Treats: Who says boosting supply can't be delicious? Our lactation treats are packed with ingredients traditionally known to support milk production. From our best-selling Emergency Brownies to various lactation cookies like Oatmeal Chocolate Chip, Salted Caramel, and Peanut Butter Chocolate Chip, they offer a convenient and satisfying way to nourish your body.
Lactation Drinks: Staying hydrated is paramount for milk production. Our lactation drink mixes such as Pumpin Punch™, Milky Melon™, and Lactation LeMOOnade™ provide refreshing hydration along with lactation support, making it easier to meet your fluid intake goals. You can also try our drink sampler packs to find your favorite flavor!

Remember, these products are designed to complement consistent milk removal, a balanced diet, and adequate hydration. They can be a wonderful part of your strategy, but they work best when integrated into a comprehensive approach.

Common Pumping Challenges and Solutions

Even with the best intentions and preparations, challenges can arise. Normalizing these experiences can help you approach them with patience and resilience.

Engorgement and Clogged Ducts

Engorgement: This happens when breasts become overly full, hard, and painful. It's often due to missed feedings or a sudden drop in demand.
- Solution: Nurse or pump frequently to remove milk. Apply warm compresses or take a warm shower before feeding/pumping to encourage letdown. Cold compresses after can reduce swelling.
Clogged Ducts: A tender, red, or painful lump in your breast, often accompanied by a feeling of warmth, indicates a clogged milk duct.
- Solution: Frequent nursing or pumping, ensuring the affected breast is fully emptied. Gentle massage towards the nipple, especially in the shower. Nurse with your baby's chin pointing towards the clog if possible. Proper flange sizing is crucial to prevent these issues.

Maintaining Your Well-being

The demands of exclusively breastfeeding and pumping can be exhausting. It’s easy to put your needs last, but your well-being directly impacts your milk supply and your capacity to care for your baby.

Rest: Sleep whenever you can. Even short naps can make a difference.
Nutrition and Hydration: Continue to prioritize nourishing meals and plenty of water.
Ask for Help: Don't be afraid to delegate tasks, accept help from friends and family, and lean on your support system.
Emotional Support: The journey can be emotionally taxing. Talk to your partner, a trusted friend, or join a supportive community. Our Official Milky Mama Lactation Support Group on Facebook is a fantastic space to connect with other moms, share experiences, and receive encouragement. You are not alone, and your feelings are valid.

Milky Mama Support: You're Not Alone

At Milky Mama, we believe that breastfeeding support should feel compassionate and empowering. We know that breastfeeding is natural, but it doesn’t always come naturally, and every mom deserves support, not judgment or pressure. Whether you're navigating initial latch issues, returning to work, or simply want to feel confident in your pumping journey, we are here for you.

Expert Guidance: Our virtual lactation consultations provide personalized, evidence-based support from an International Board Certified Lactation Consultant (IBCLC).
Empowering Education: Our online breastfeeding classes, including our comprehensive Breastfeeding 101 course, equip you with the knowledge and skills to thrive.
Community Connection: Join thousands of other breastfeeding moms in The Official Milky Mama Lactation Support Group on Facebook. You can also follow us on Instagram for daily tips, inspiration, and to connect with our vibrant community.

Remember, every drop counts, and your well-being matters too. We are honored to be a part of your amazing journey.

FAQ

Q1: When is the best time to start pumping if I'm exclusively breastfeeding?

A1: For most exclusively breastfeeding moms with healthy, full-term babies, it's generally recommended to wait until breastfeeding is well-established, typically around four to six weeks postpartum. This allows your milk supply to regulate and your baby to become proficient at nursing. However, if your baby is in the NICU, has latch issues, or you have medical concerns, a lactation consultant may advise starting pumping earlier to establish and maintain supply.

Q2: How often should I pump to maintain my milk supply while away from my baby?

A2: To maintain your milk supply, aim to pump as often as your baby would typically nurse if they were with you. This usually means pumping every 2.5 to 3 hours, or at least 8-10 times in a 24-hour period. Each session should last 15-20 minutes, or until your breasts feel soft and well-emptied. Consistency is key to signaling your body to continue milk production.

Q3: What is power pumping, and when should I use it?

A3: Power pumping is a technique designed to mimic a baby's cluster feeding to help increase your milk supply. It involves a specific one-hour schedule, typically once a day: pump for 20 minutes, rest for 10, pump for 10, rest for 10, and finish with a 10-minute pump. It's a short-term tool that can be effective if you're experiencing a dip in supply, trying to build a stash, or during growth spurts, but it's not necessary if your supply is already sufficient.

Q4: How do I know if my breast pump flanges are the correct size?

A4: Correct flange sizing is crucial for comfortable and effective pumping. Your nipple should fit comfortably in the center of the flange tunnel and move freely back and forth without rubbing the sides. Only a small amount of your areola should be drawn into the tunnel. If you experience pain, discomfort, or notice reduced milk output, your flange size may be incorrect. It's highly recommended to consult with a lactation consultant for a proper assessment, as nipple sizes can vary and even change over time.