Infant dyschezia is a common, benign condition in young babies — typically those under six months old — where a baby strains, grunts, turns red or purple in the face, and may cry for several minutes before successfully passing a soft or normal stool. Despite how alarming it looks, the baby is not in pain from constipation. The stool itself is completely normal.

The condition is classified under the Rome IV criteria for functional gastrointestinal disorders in infants — meaning it has a physiological cause rather than any underlying disease. It is sometimes called grunting baby syndrome, which captures the most noticeable symptom perfectly well.

Key fact

Infant dyschezia is extremely common. Research suggests it affects up to 3–4% of all infants in the first weeks of life, though anecdotally the figures may be higher as many cases go unreported.

Signs and symptoms of dyschezia in infants

The hallmark feature of newborn dyschezia is the combination of effort and normal output. If your baby displays all or most of these signs, dyschezia is the most likely explanation:

Straining and pushing for 10–30 minutes (sometimes longer) before a bowel movement

Grunting, crying, or screaming during the effort

Face turning red, purple, or flushed

Drawing legs up toward the abdomen

Immediate calm and contentment after passing stool

Stool that is soft, yellow or mustard-coloured (normal for age)

Occurs every time the baby tries to pass a bowel movement

Baby feeds well and gains weight normally

Important distinction

The moment of calm and normal stool after straining is the clearest sign this is dyschezia and not constipation. Constipation produces hard, pellet-like stools — dyschezia does not.

Why does dyschezia happen?

Dyschezia in infants happens because of an immature neuromuscular coordination between two muscle groups that need to work in unison. To pass a stool comfortably, a baby must simultaneously:

1.1 Increase abdominal pressure

This requires the abdominal muscles to contract — essentially “bearing down” or pushing. Newborns are still learning to recruit these muscles voluntarily.

1.2 Relax the pelvic floor

At the same time, the pelvic floor and anal sphincter must relax to allow passage. This relaxation response is also still being developed in young infants.

1.3 Coordinate both simultaneously

The challenge is doing both at once. Many young babies initially tighten their pelvic floor when they try to push — the opposite of what’s needed. This mis-coordination is the root cause of grunting baby syndrome.

Put simply, your baby is still learning how to poo. This is not a sign of a digestive disease, formula intolerance, or anything you have done wrong. It is a normal part of infant neurological development and will resolve on its own.

Dyschezia vs constipation: key differences

One of the most common misconceptions is that a straining, grunting baby must be constipated. In practice, these are very different conditions. The table below summarises the main distinctions:

If you are unsure which your baby is experiencing, the NHS guidance on infant constipation offers a helpful overview of warning signs to look out for.

Infant dyschezia relief: what actually helps

While dyschezia will resolve naturally as your baby matures, watching your newborn strain and cry is distressing. There are a few gentle techniques some parents find helpful in the moment — though it is worth noting that the most effective “treatment” is simply patience.

Gentle movements to try during an episode

1.1 Bicycle legs

Lay your baby on their back and gently move their legs in a cycling motion. This can help stimulate the bowel and ease abdominal tension.

1.2 Tummy time (supervised)

Brief periods of supervised tummy time can apply gentle pressure to the abdomen, which some babies find relieving.

1.3 Gentle abdominal massage

Using warm hands, massage your baby’s tummy in gentle clockwise circles — following the direction of the large intestine. Keep pressure very light.

1.4 Warm bath

A warm bath can help relax the muscles overall, which may make it easier for your baby to coordinate the muscle movements needed.

1.5 Stay calm yourself

Babies are remarkably attuned to parental stress. Staying calm and reassuring during episodes can help your baby relax more quickly.

“The best thing a parent can do during a dyschezia episode is often simply be present, calm, and reassuring.”

What about rectal stimulation?

Some parents are advised — or resort to — using a cotton bud, thermometer, or finger to stimulate the rectum. While this may prompt a bowel movement in the short term, most paediatric gastroenterologists advise against making it a habit. Regular rectal stimulation can interfere with the very reflex development your baby needs to learn, potentially prolonging the condition. The Journal of Pediatric Gastroenterology and Nutrition recommends parental reassurance over intervention in most cases.

Infant dyschezia treatment

The honest answer is that infant dyschezia does not require medical treatment in the vast majority of cases. It is a self-limiting functional condition. However, parents naturally look for reassurance and guidance, so here is what the evidence suggests:

If you are breastfeeding, there is no evidence that dietary changes on your part will affect dyschezia, as it is a mechanical coordination issue rather than a digestive one. For further reading on infant gut development, the NHS baby development pages and the American Academy of Pediatrics (AAP) are reliable resources.

Infant dyschezia: when does it go away?

This is the question every exhausted parent wants answered. The good news is clear: infant dyschezia almost always resolves completely by 3–4 months of age, and in many cases much sooner — often within weeks of onset.

The reason it resolves is straightforward: as your baby’s nervous system matures and they gain more body awareness and muscle control, they naturally learn to coordinate the pushing and relaxing motions needed to pass a stool without effort. This is a developmental milestone, like learning to lift their head — it just happens on its own timetable.

Reassurance

Dyschezia does not cause your baby any lasting harm. The straining episodes, while distressing to watch, do not damage the bowel, cause hernias (in themselves), or indicate any underlying illness. Your baby will learn this skill — it just takes time.

When to see a doctor

While dyschezia is almost always benign, it is important to be aware of signs that could indicate something more serious. Contact your GP, health visitor, or paediatrician if your baby shows any of the following:

Seek medical advice if your baby has:

• Hard, dry, or pellet-like stools (sign of constipation, not dyschezia)
• Blood in the stool or on the nappy
• No stool passed for more than a week (in formula-fed babies) or 2–3 weeks (in exclusively breastfed babies over 6 weeks)
• Significant abdominal distension (a noticeably swollen or hard belly)
• Persistent distress that does not resolve after passing stool
• Dyschezia-like symptoms that continue beyond 4 months of age
• Poor weight gain or feeding difficulties alongside straining
• Fever, vomiting, or other signs of illness during episodes

These symptoms may suggest conditions such as Hirschsprung’s disease, hypothyroidism, anorectal malformations, or true infant constipation — all of which require proper medical assessment. When in doubt, always consult a qualified healthcare professional. You can find further guidance at the NHS infant constipation page or the Great Ormond Street Hospital patient information pages.

Frequently asked questions

Is infant dyschezia painful for my baby?

Can dyschezia affect breastfed and formula-fed babies equally?

My baby goes red and holds their breath. Is this dangerous?

Should I try probiotics for grunting baby syndrome?

How is infant dyschezia diagnosed?

Can I give my newborn gripe water or simethicone drops for dyschezia?

My baby is 5 months old and still straining a lot. Is this still dyschezia?

References and further reading

1. Benninga MA, et al. “Childhood Functional Gastrointestinal Disorders: Neonate/Toddler.” Gastroenterology. Rome IV Criteria, 2016.
2. NHS — Constipation in babies and children
3. American Academy of Pediatrics — Newborn and Infant Nutrition
4. Great Ormond Street Hospital — Constipation in children
5. Rome Foundation — Rome IV Criteria for Functional GI Disorders
6. Journal of Pediatric Gastroenterology and Nutrition (JPGN)

Medical disclaimer: This article is intended for general informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional — your GP, health visitor, or paediatrician — for concerns about your baby’s health. If your baby is in distress or you are worried, seek medical advice promptly.