Biting during breastfeeding is painful and startling, but it’s almost always a phase you can work through. Most biting starts between 6 and 12 months, when teeth begin erupting, and the key to stopping it is a combination of watching for warning signs, responding consistently, and making small adjustments to your latch and timing.
Why Babies Bite During Nursing
A baby who is actively nursing and swallowing cannot bite. Their tongue covers the lower teeth during a proper latch, making it physically impossible to clamp down while they’re drinking. Biting happens in the moments when active suckling stops: at the end of a feeding when hunger is satisfied, when your baby gets distracted or playful, or when they start to drift off to sleep.
Teething is the most common trigger. Lower central incisors typically appear between 6 and 10 months, followed by the upper central incisors between 8 and 12 months. Swollen, tender gums make babies want to press down on anything near their mouth. But teething isn’t the only reason. Babies also bite when they’re congested and struggling to breathe while nursing, when they have an ear infection (watch for ear tugging), or simply because they’re experimenting with cause and effect and want to see your reaction.
As your baby grows, it’s also worth checking whether the latch has gotten lazy. A shallow latch that worked fine at three months may position the nipple closer to new teeth at eight months.
How to React When It Happens
Your immediate response matters more than anything else you do. Stay calm, say “no” in a firm voice, and frown. Don’t laugh, smile, or shriek in a way that might seem entertaining to your baby. Then end the feeding. Put your baby down briefly so they connect biting with losing access to the breast. This isn’t punishment; it’s a clear, consistent signal that biting stops the meal.
Before you pull away, break the suction first. Slide your finger into the corner of your baby’s mouth and gently press down on your breast. Never try to pull your baby straight off the nipple, because the clamping force can tear skin and make the injury significantly worse.
An alternative in the moment: if you feel your baby’s jaw tensing (the telltale sign a bite is coming), pull them in closer to your breast instead of pulling away. This makes it harder for them to clamp down and often triggers them to open their mouth wider to breathe.
Preventing Bites Before They Happen
Most biting follows a pattern. Pay attention to when it happens. Is it always at the end of a feeding? A specific time of day? A particular nursing position? Once you spot the pattern, you can intervene before the bite comes.
The most reliable prevention strategy is watching for the moment active suckling slows down. Keep your finger ready near your baby’s mouth, and as soon as the rhythmic suck-swallow pattern stops, break the suction and remove your breast. This catches the window between “done eating” and “about to chomp” before your baby has the chance to bite.
If your baby consistently bites during low-interest feedings (when they’re not particularly hungry but nursing for comfort), consider offering milk by cup during those times and reserving the breast for when they’re genuinely hungry. Hungry babies nurse; bored babies bite.
Fix the Latch
A deep latch positions your nipple far back in your baby’s mouth, well past the teeth. If your baby has been latching more shallowly as they’ve grown, their new teeth sit right on the nipple, and even minor jaw movements can cause pain.
Bring your baby to the breast (rather than leaning your breast toward them), aim the nipple toward the roof of their mouth, and wait for a wide-open mouth before latching. With older babies who are congested, a more upright position helps them breathe more easily and reduces the urge to bite down or pull off abruptly.
Satisfy the Urge to Chew Before Nursing
If teething is driving the biting, give your baby something to chew on before you start nursing. A firm rubber teething ring or a textured silicone toy works well. You can chill it in the refrigerator (not the freezer, as frozen teethers are too hard and can bruise tender gums). Gently rubbing your baby’s gums with a clean finger before latching can also relieve enough pressure that they’re less likely to bite during the feeding.
Silicone rings, ridged rubber shapes, and soft toothbrush-style teethers are all good options. Avoid liquid-filled teethers, which can break. And avoid topical numbing gels containing benzocaine or lidocaine. The FDA warns that these products offer little benefit for teething pain and carry serious risks for infants, including a rare but potentially fatal blood condition that reduces the body’s ability to carry oxygen. The American Academy of Pediatrics recommends sticking with finger massage and firm rubber teethers instead.
Positive Reinforcement Works
Stopping biting isn’t just about discouraging the bad behavior. When a feeding goes well with no biting, gently stroke your baby and offer quiet praise. Babies pick up on your tone and body language quickly. Over time, the contrast between “biting ends the feeding” and “gentle nursing gets cuddles and calm attention” becomes a powerful motivator, even for babies too young to understand words.
Healing Nipple Damage From Bites
If a bite has broken the skin, you may be surprised to learn that applying nothing, or dabbing a small amount of your own expressed breast milk on the wound, appears to work as well as lanolin or other ointments for healing. A Cochrane review of nipple pain treatments found insufficient evidence to recommend any specific product over simply keeping the area clean and dry. Most nipple pain resolves to mild levels within 7 to 10 days.
If you have visible broken skin that isn’t improving, or signs of infection like redness spreading outward, warmth, or yellow discharge, a healthcare provider may recommend a topical antibacterial or antifungal treatment. But for a straightforward bite mark, the most important thing is fixing the latch and stopping the biting so the tissue can heal without repeated trauma.
You can continue nursing on the injured side if the pain is tolerable. If not, nurse on the uninjured side and hand-express or pump from the sore side until it feels better. Skipping that breast entirely for days can lead to engorgement or a drop in supply.