Why Does My Baby Grunt So Much?
Is your baby grunting constantly? Discover the common reasons behind infant grunting, from developing digestive systems and gas to mastering bowel movements. Learn when it's normal and when to consult your pediatrician.
Written by Dr. Siri Nallapu
Reviewed by Dr. Shaik Abdul Kalam MD (Physician)
Last updated on 12th Aug, 2025
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As a new parent, you might notice your baby making all sorts of sounds—coos, cries, and sometimes, frequent grunting. While it can be adorable, it may also leave you wondering, "Why does my baby grunt so much?" Rest assured, grunting is usually normal in newborns and infants, but understanding why it happens can help ease your concerns.
Why Do Babies Grunt?
Grunting in babies is often related to their developing bodies adjusting to life outside the womb. Here are some common reasons:
- Digestive System Development
Newborns are still learning how to coordinate their digestive muscles. When they pass gas or have a bowel movement, they may grunt as they strain. This is because their abdominal muscles are weak, and grunting helps them push. - Reflux or Gas
Babies swallow air while feeding, which can lead to gas buildup. Grunting may be their way of trying to relieve discomfort. Acid reflux (GER) can also cause grunting, especially after feeds. - Sleep Grunting (Newborn Grunting Syndrome)
Some babies grunt a lot while sleeping due to immature nervous and respiratory systems. They may sound like they’re struggling, but this usually resolves as they grow. - Respiratory Adjustments
A baby’s lungs are still adapting to breathing air. Sometimes, mucus or mild congestion can cause grunting as they clear their airways. - Constipation
If your baby is straining and grunting without passing stool, they might be constipated. Look for hard, dry stools or fewer bowel movements than usual.
When Should You Be Concerned?
While grunting is usually harmless, consult a doctor if you notice:
- Persistent grunting (especially with every breath)
- Fever, vomiting, or refusal to feed
- Blue lips or difficulty breathing
- No bowel movements for several days
These could indicate infections, respiratory issues, or digestive problems that need medical attention.
Consult Top Pediatrician For Personalised Tips
How to Help Your Grunting Baby?
For Gas and Digestion
- Burp your baby after every feed.
- Try gentle tummy massages in a clockwise motion.
- Bicycle their legs to help release trapped gas.
- Keep them upright for 1520 minutes after feeding to reduce reflux.
For Constipation
- Offer small amounts of water (if older than 6 months).
- Increase fiber (if on solids) with pureed prunes or pears.
- Warm baths can help relax their muscles.
For Sleep Grunting
- Use a humidifier to keep airways moist.
- Elevate the crib mattress slightly (only if recommended by a doctor).
When to See a Doctor?
If grunting is accompanied by other worrying symptoms, or if your baby seems in distress, don’t hesitate to seek medical advice. At Apollo 24|7, you can easily consult a pediatrician online or schedule an in-person visit for peace of mind.
Final Thoughts
Most babies grunt as part of their normal development, and it usually improves by 34 months as their muscles strengthen. However, always trust your instincts—if something feels off, a quick check with a doctor can reassure you and ensure your little one stays healthy.
Consult Top Pediatrician
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Consult Top Pediatrician For Personalised Tips
Dr. Jayati Das
Paediatrician
9 Years • MBBS , MD (Paediatrics)
Howrah
Bijaya Clinic, Howrah
Dr. Guruprasad N
Paediatrician
7 Years • MBBS, MD Peadiatrics, DNB pediatrics
Bangalore
Apollo Clinic Bellandur, Bangalore
Dr. Dinesh Kumar Chandak
Paediatrician
10 Years • MBBS,MD PAEDIATRICS
Barasat
Diab-Eat-Ease, Barasat
(50+ Patients)
Dr. Akhila Hb
Paediatrician
10 Years • MBBS, MD ( PAEDIATRICS), Fellowship in Asthma and Allergy
Bengaluru
Apollo Medical Center, Marathahalli, Bengaluru
(50+ Patients)
Dr. S V S Sreedhar
Paediatrician
18 Years • MBBS,MD(Paediatrics) FIPEM(Fellowship in Paediatric Emergency Medicine) STEP, PGDID (PG Diploma In Infectious Diseases, Australia) Senior Pediatrician & HOD of the PAEDIATRIC EMERGENCY DEPARTMENT SENIOR SONSULTANT IN PEDIATRICS & PAEDIATRIC EMERGENCY MEDICINE Clinical supervisor for RCEM, UK. Clinical tutor in MACQUARIE University, Australia.
Hyderabad
Navyo childrens clinic, Hyderabad
(325+ Patients)