Newborn colic: why your baby cries and what actually helps

Updated

Colic is not an illness or a diagnosis but a description: a healthy, well-fed, well-cared-for baby cries for long stretches with no obvious cause, usually toward evening, and is almost impossible to settle. It is exhausting, but not dangerous in itself, and it passes with age.

Below: how to tell colic from other reasons for crying, what helps during an episode, what to avoid, and the cases where crying calls not for patience but for an urgent visit to a doctor.

What colic is

The classic marker is the "rule of threes": crying for more than 3 hours a day, on more than 3 days a week, for more than 3 weeks in a healthy baby who is gaining weight well. Episodes usually begin at 2–3 weeks, peak around 6 weeks, and in most babies resolve by 3–4 months.

The typical picture: the baby suddenly bursts into crying, often in the evening, pulls their legs up to the tummy, clenches their fists, goes red, and the belly feels tense. Between episodes they look and seem perfectly well.

Why colic happens

The honest answer: there is no single proven cause. An immature gut and nervous system, swallowed air during feeds, and sensitivity to over-stimulation by the end of the day are all discussed. No single theory explains every case, which is why there is no "magic cure" — what works is a set of techniques that lower the load, not a medicine.

What helps during an episode

  1. Contact and movement. Pick the baby up, hold them close, rock them gently. Rhythmic movement — in your arms, in a sling, on a slow walk — settles many babies.
  2. White noise. A steady sound — an extractor fan, a hair dryer, a dedicated app — echoes what the baby heard before birth and often softens the crying.
  3. Tummy-down along your forearm. Head in the crook of your elbow, tummy resting on your arm — the light pressure helps some babies. Carry the baby this way only while awake; always put them down to sleep on their back.
  4. Warmth and quiet. Dim the lights, cut the extra noise. By evening an over-stimulated baby needs fewer inputs, not more.
  5. Check the basics. Hungry? Wet nappy? Too hot or too cold? Sometimes "colic" is an unspoken simple need.

Feeding and colic

Swallowed air adds to the discomfort, so after every feed hold the baby upright until they burp it up. On formula, a bottle with an anti-colic valve and the right tilt — so the teat stays full of milk — helps.

Switching formula, lactose-free or hypoallergenic options, and a breastfeeding mother's diet are decisions to make only with a paediatrician. Do not change the formula "just in case" on your own: most of the time it is not the cause.

What does not work, and what to avoid

When crying is not colic but a reason to see a doctor

Seek help urgently if crying comes with a fever of 38 °C or higher (in a baby under 3 months, immediately), projectile vomiting, blood or mucus in the stool, refusing to feed, lethargy, unusual paleness, poor weight gain or weight loss, or if the character of the cry suddenly changes or the baby will not settle at all. These are not features of colic.

If you are at your limit and feel you might snap — put the baby somewhere safe (a cot, on their back) and step away for a few minutes to breathe. A baby crying in a cot is safe; a baby in the arms of an exhausted parent is not always.

How to see what triggers the episodes

Colic feels like chaos, but there is almost always a pattern — it is just impossible to hold in your head on no sleep. Logging feeds, sleep and the timing of crying for a few days often reveals the link: when the "hard hour" usually starts, how it lines up with feeds and settling. It does not cure colic, but it helps you prepare for the peak time and describe the picture to a doctor specifically, rather than "they cry a lot".

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Frequently asked questions

When does newborn colic go away?

Colic usually starts at 2–3 weeks, peaks around 6 weeks, and in most babies resolves by 3–4 months. It is an age-related state that clears up on its own.

Why does the baby cry specifically in the evenings?

Tiredness and over-stimulation build up by the end of the day, and an immature nervous system copes with them less well. That is why the "hard hour" in babies with colic tends to fall in the evening.

Do colic drops and medicines help?

Most over-the-counter remedies have no proven effect and some are unsafe. Any medication only on a paediatrician's advice. Soothing techniques usually work better than medicine.

Should I change the formula for colic?

Not on your own. Switching to lactose-free or hypoallergenic formula, like a breastfeeding mother's diet, is discussed with a doctor: usually the cause is not the feed, and frequent changes only upset digestion.

How do I tell colic from something serious?

Colic is crying in an otherwise healthy baby who feeds and gains weight well. Fever, vomiting, blood in the stool, refusing to feed, lethargy or weight loss are not colic — they are a reason to see a doctor urgently.

Sources

This article is for general information and does not replace medical advice. Colic is a diagnosis of exclusion: a paediatrician makes it after ruling out other causes of crying. Discuss any concern about your baby's health, feeding or wellbeing with your own doctor.