Breast Milk Leakage
For many new mothers, breastfeeding is one of the first ways they connect with their baby. But breastfeeding can also come with a few surprises. One of them is leaking breast milk.
You may be sitting on the couch, taking a shower, hearing your baby cry, or feeding on one side when suddenly your other breast starts leaking. It can be messy, uncomfortable, and sometimes embarrassing, especially when you’re away from home.
The good news is that breast milk leakage is common. It doesn’t mean anything is wrong with you or your milk supply.
Why Do Breasts Leak Milk?
Breast milk leakage usually happens because of the milk ejection reflex, often called the letdown reflex. When your baby begins nursing, your body releases oxytocin. This hormone causes the muscles around the milk producing cells in your breasts to contract and push milk toward the nipple.
Sometimes that reflex happens in both breasts at the same time.
That means you may be feeding your baby from one breast while milk is leaking from the other. Your baby doesn’t even have to be nursing for it to happen. Hearing your baby cry, thinking about your baby, or simply feeling your breasts become full can sometimes trigger letdown.
Leaking is especially common during the early months of breastfeeding, when your body is still adjusting milk production to your baby’s needs.
Research has shown just how common it can be. A study that followed breastfeeding mothers found that 66 percent were still experiencing leaking breasts at six months postpartum. The study also found that many mothers felt frustrated or embarrassed by the unpredictability of leaking.
More recent breastfeeding research also shows that milk leakage remains one of the physical challenges some mothers experience while breastfeeding.
How Long Does Breast Milk Leakage Last?
There’s no magic date when breast milk leakage suddenly stops.
For some mothers, leaking is mostly a problem during the first few weeks. For others, it continues for several months. Some women may occasionally leak throughout their entire breastfeeding experience.
Your milk supply usually becomes more responsive to your baby’s needs as breastfeeding continues. As that happens, some mothers notice that their breasts don’t feel as full and they leak less often.
That doesn’t happen on the same schedule for everyone.
Current breastfeeding recommendations also extend beyond the first few months. The CDC says the Dietary Guidelines for Americans, American Academy of Pediatrics, and World Health Organization recommend exclusive breastfeeding for about the first six months, followed by complementary foods while continuing to breastfeed until age 2 or longer.
If you’re dealing with leaking breasts, it doesn’t mean you need to stop breastfeeding. It’s usually something that can be managed while you continue nursing.
Ways to Manage Leaking Breast Milk
The simplest solution for many mothers is a nursing pad.
Disposable nursing pads can be tucked inside your bra to absorb leaking milk. Washable cloth pads are another option. If you’re leaking heavily, you may need to change your pads during the day to keep your skin and clothing dry.
A wet nursing pad sitting against your nipple for hours isn’t comfortable, either. Keeping the area dry can help prevent irritation.
Some mothers also use breast milk collectors. These devices sit over the nipple and collect milk that would otherwise leak into a nursing pad or onto your clothing. They’re particularly useful when milk leaks from the opposite breast while you’re nursing or pumping.
If you’re collecting milk, follow the manufacturer’s cleaning and storage instructions and handle the milk safely.
You can also keep an extra shirt in your diaper bag, purse, desk, or car. It sounds simple, but it can save you from having to spend the afternoon walking around with a very obvious wet spot on your shirt.
The Emotional Side of Leaking
The physical mess isn’t always the hardest part.
Some mothers feel embarrassed when milk leaks through their clothing at work, in public, or around friends and family. Others become frustrated because they feel like their body is doing something they can’t control.
You’re not doing anything wrong.
Breast milk leakage is a normal part of lactation for many women. A 1989 study found that the unpredictability of leaking could affect mothers’ confidence and make them feel uncomfortable about being out in public.
Returning to work can make the problem more noticeable. A mother who was comfortable leaking at home may suddenly have to think about leaking during a meeting, while commuting, or while wearing work clothes.
Planning ahead can make a big difference.
Keep nursing pads available. Have a spare shirt nearby. If you’re pumping at work, try to maintain a regular pumping schedule that works with your baby’s feeding pattern and your workplace situation.
The CDC provides current information about breastfeeding and maintaining breastfeeding when returning to work or dealing with changes in routine.
What About Breast Engorgement?
Leaking can also happen when your breasts become overly full.
Breast engorgement is especially common around the time your milk supply increases after delivery. ACOG says engorgement most often occurs around days three to five after birth, although the timing can vary.
Your breasts may feel hard, heavy, swollen, or tender. Your nipples may also become more difficult for your baby to latch onto.
If your breasts become uncomfortably full, breastfeeding or expressing enough milk to relieve the pressure can help. ACOG cautions against excessive breast emptying because repeatedly removing large amounts of milk can encourage an oversupply.
If you’re struggling with engorgement or your baby is having trouble latching, a lactation professional can help you figure out what’s happening.
You can also read more about postpartum breast changes in our first month after birth guide.
Can Leaking Breasts Mean You Have Too Much Milk?
Not necessarily.
Some women leak frequently and have a normal milk supply. Others have an oversupply of milk and may experience more fullness, forceful letdown, leaking, or breast discomfort.
Leaking by itself isn’t a reliable way to determine whether you have too much milk.
Likewise, not leaking doesn’t mean you don’t have enough milk.
If you’re worried about your baby’s milk intake, look at the bigger picture. Your baby’s weight gain, feeding behavior, diaper output, and overall health provide much more useful information than whether your breasts leak.
Our guide to knowing whether your baby is getting enough breast milk covers some of the signs parents can watch for.
When Should You Talk to Your Doctor?
Breast milk leaking by itself usually isn’t a medical problem. But other breast symptoms shouldn’t be ignored.
Contact your healthcare provider if you develop significant breast pain, a hot or swollen area, redness, fever, chills, or flu-like symptoms. These can be signs of mastitis or another breast problem.
You should also talk with your healthcare provider if you have nipple discharge that isn’t typical breast milk, particularly if the discharge is bloody or clear rather than milky.
And if breastfeeding hurts significantly or you’re having ongoing problems with your baby’s latch, don’t simply assume you have to put up with it. A lactation consultant, breastfeeding medicine specialist, midwife, or physician may be able to identify the problem and help.
Breastfeeding Doesn’t Have to Be Perfect
Breastfeeding can be wonderful, but it isn’t always tidy.
Sometimes your baby will nurse for what feels like an hour. Sometimes you’ll finally get dressed and immediately leak through your shirt. Other days everything goes smoothly.
That’s motherhood.
Breast milk leakage is one of those small but surprisingly frustrating parts of breastfeeding that many mothers experience. Nursing pads, breast milk collectors, spare clothing, and a little planning can make it much easier to manage.
Most importantly, leaking doesn’t mean you’re doing something wrong. Your body is responding to the hormonal and physical changes that come with producing milk.
If you’re having other symptoms, however, don’t try to diagnose yourself based on leakage alone. Your healthcare provider or lactation professional can help you determine what’s normal for you and what may need attention.
For more information about pregnancy, postpartum recovery, and breastfeeding, visit our Pregnancy section and Infants section.
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