My Baby Bites During Breastfeeding
Medically reviewed by Dr. Rachel Kim, MD, RDN · Pediatric Nutrition Specialist
Content reviewed against published La Leche League, AAP, KellyMom guidelines
Last reviewed:
Feeding challenges are one of the most common concerns new parents face. When it comes to bites during breastfeeding, here is what the guidelines recommend.
The short answer
Being bitten while breastfeeding is painful and distressing, but it is usually a phase that can be managed. Babies bite for various reasons: teething discomfort, playfulness, distraction, trying to slow milk flow, or experimenting with their new teeth. The key is to respond calmly but firmly - unlatch your baby immediately, say "no biting" in a neutral tone, and pause the feeding briefly. Most babies learn quickly that biting ends the feeding.
Key takeaways
- Being bitten while breastfeeding is painful and distressing, but it is usually a phase that can be managed. Babies bite for various reasons: teething discomfort, playfulness, distraction, trying to slow milk flow, or experimenting with their new teeth. The key is to respond calmly but firmly - unlatch your baby immediately, say "no biting" in a neutral tone, and pause the feeding briefly. Most babies learn quickly that biting ends the feeding.
- Usually normal when: Your baby bites once or twice, you respond by unlatching, and the behavior stops
- Call your doctor if: You have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain
- Varies by age — see the age-by-age breakdown below
“The AAP recommends exclusive breastfeeding for approximately 6 months after birth. Furthermore, the AAP supports continued breastfeeding, along with appropriate complementary foods introduced at about 6 months, for 2 years or beyond.”
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What Parents Should Know
According to La Leche League, AAP, KellyMom guidelines, being bitten while breastfeeding is painful and distressing, but it is usually a phase that can be managed. Babies bite for various reasons: teething discomfort, playfulness, distraction, trying to slow milk flow, or experimenting with their new teeth. The key is to respond calmly but firmly - unlatch your baby immediately, say "no biting" in a neutral tone, and pause the feeding briefly. Most babies learn quickly that biting ends the feeding. At 0-4 months, babies this young do not yet have teeth, so true biting is rare. However, they may clamp down with their gums, especially during teething preparation or if they are frustrated with milk flow (too fast or too slow). Clamping can also happen if your baby has a shallow latch. If gum clamping is frequent and painful, consult a lactation consultant to assess latch and rule out tongue tie or other structural issues. It is generally considered normal when your baby bites once or twice, you respond by unlatching, and the behavior stops. However, you should contact your pediatrician promptly if you have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain.
Normal vs. Concerning
By Age
What to expect by age
0-4 months
Babies this young do not yet have teeth, so true biting is rare. However, they may clamp down with their gums, especially during teething preparation or if they are frustrated with milk flow (too fast or too slow). Clamping can also happen if your baby has a shallow latch. If gum clamping is frequent and painful, consult a lactation consultant to assess latch and rule out tongue tie or other structural issues.
4-8 months
This is peak teething time, and many babies get their first teeth around 6 months. Teething babies may bite down to soothe sore gums. Biting often happens at the end of a feeding when they are no longer actively sucking. Watch for your baby's feeding cues: when they start to slow down or become playful, unlatch them before they have a chance to bite. Offer a cold teether before nursing to ease gum discomfort.
8-12 months
Older babies may bite out of curiosity, to get a reaction, or because they are distracted and not focusing on nursing. Some babies bite during a fast letdown because they are trying to slow the flow. If biting becomes a pattern, immediately unlatch, set your baby down, and pause for a moment. Babies quickly learn that biting = no more nursing. Stay calm - big reactions (yelling, laughing) can reinforce the behavior.
12 months+
Toddlers sometimes bite while nursing if they are bored, seeking attention, or testing boundaries. Consistent, calm responses are key. Some parents find success with saying "gentle" and modeling soft touches, or limiting nursing sessions to times when the toddler is genuinely hungry and focused. If biting becomes frequent and painful, it is okay to set boundaries or consider weaning if breastfeeding is no longer working for you.
What to Tell Your Pediatrician
- Describe when you first noticed bites during breastfeeding and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby bites during every single feeding session despite your attempts to prevent it.
- Mention if you have developed cracked, bleeding, or infected nipples due to repeated biting.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your baby bites once or twice, you respond by unlatching, and the behavior stops
- Your baby clamps down gently when sleepy or at the end of a feed, but releases when you break the latch
- Biting happens during a few days of intense teething, then resolves once the tooth breaks through
- Your baby bites when distracted, but stops when you minimize distractions and refocus them on nursing
- Your baby bites during every single feeding session despite your attempts to prevent it
- You have developed cracked, bleeding, or infected nipples due to repeated biting
- Your baby seems to have a painful latch or nursing is always uncomfortable, which may indicate structural issues beyond simple biting
- You are experiencing severe nipple pain or trauma and are considering stopping breastfeeding because of it
- You have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain
- Your nipple is severely damaged with deep cracks, bleeding that won't stop, or signs of infection (pus, extreme redness, swelling)
- You suspect your baby has thrush (white patches in mouth) or you have nipple thrush (shiny, itchy, burning nipples) - both need treatment
What You Can Do at Home
- Keep track of when you notice bites during breastfeeding — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your baby bites once or twice, you respond by unlatching, and the behavior stops — this is generally within the range of normal.
- At 0-4 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Offer feeding in a calm, distraction-free environment. Avoid forcing or pressuring your baby to eat.
- While monitoring at home, seek immediate care if you have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain.
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Feeding & Nutrition Guide
Complete guide to breastfeeding, formula feeding, and solid food introduction.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is bites during breastfeeding normal?
When should I call the doctor about bites during breastfeeding?
When is bites during breastfeeding normal?
What causes bites during breastfeeding?
What should I mention to my pediatrician about bites during breastfeeding?
Is bites during breastfeeding normal at 0-4 months?
Is bites during breastfeeding normal at 4-8 months?
Should I go to the ER for bites during breastfeeding?
Does bites during breastfeeding go away on its own?
References
- [1]La Leche League International. How Do I Get My Baby to Stop Biting During Breastfeeding? La Leche League
- [2]American Academy of Pediatrics. Teething and Breastfeeding. HealthyChildren.org, 2024. AAP
- [3]KellyMom Parenting & Breastfeeding. Biting and Breastfeeding: What to Do. KellyMom
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Baby Bites During Breastfeeding.
Things to mention
- Describe when you first noticed bites during breastfeeding and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby bites during every single feeding session despite your attempts to prevent it.
- Mention if you have developed cracked, bleeding, or infected nipples due to repeated biting.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your baby bites during every single feeding session despite your attempts to prevent it
- You have developed cracked, bleeding, or infected nipples due to repeated biting
- Your baby seems to have a painful latch or nursing is always uncomfortable, which may indicate structural issues beyond simple biting
Urgent signs to report immediately
- You have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain
- Your nipple is severely damaged with deep cracks, bleeding that won't stop, or signs of infection (pus, extreme redness, swelling)
- You suspect your baby has thrush (white patches in mouth) or you have nipple thrush (shiny, itchy, burning nipples) - both need treatment
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of bites during breastfeeding are normal. Talk to your pediatrician if you have signs of a breast infection (mastitis): fever, flu-like symptoms, red/hot area on breast, severe pain.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Baby Biting Nipple While Nursing
Biting during breastfeeding is a common challenge, especially when babies start teething. It can be startling and painful, but it is almost always a phase that can be managed. Babies cannot actively nurse and bite at the same time because their tongue covers the lower teeth during proper sucking. Biting typically happens at the beginning or end of a feed when the latch is not active. With some gentle strategies, most babies learn quickly that biting ends the feeding session.
My Baby Keeps Clamping Down on the Spoon
Clamping down on the spoon is very common, especially during teething or when babies are learning new oral motor skills. It is often a sensory exploration behavior rather than a feeding problem. Using a soft silicone spoon and placing food on the front of the spoon can help.