Baby colic: causes, relief methods and when to call a doctor

What is colic?

Colic is the name given to intense, inconsolable crying in a healthy baby. Doctors use the "rule of 3" as a working definition: crying for more than 3 hours a day, more than 3 days a week, for more than 3 weeks in a row.

It typically starts in the second or third week of life, peaks around 6 weeks, and resolves on its own by 3–4 months. About one in five babies experiences colic, so you are far from alone.

What causes colic?

The honest answer is that no one knows for certain. Research points to several likely contributors:

• Immature digestive system: The gut is still developing and can cramp when gas moves through it.
• Trapped gas: Swallowing air during feeds — especially with a fast let-down or bottle feeding — leads to painful gas pockets.
• Overstimulation: Newborns have a limited ability to filter sensory input. By evening, the nervous system can be overwhelmed, triggering prolonged crying.
• Gut microbiome imbalance: Some studies suggest colicky babies have a different mix of intestinal bacteria, though research is ongoing.

Colic is not caused by poor parenting, bad feeding technique, or anything you did wrong.

How to soothe a colicky baby

No single method works for every baby, but these approaches have the best evidence behind them:

• The 5 S's (Dr Harvey Karp): Swaddle snugly, hold on Side or Stomach, Shush with white noise, Swing with gentle motion, offer Sucking on a pacifier. Using all five together is more effective than any one alone.
• Bicycle legs: Gently move your baby's legs in a cycling motion while they lie on their back. This helps move trapped gas along the intestine.
• Feeding position: Hold your baby more upright during and after feeds. Burp frequently — after every 60–90 ml if bottle-feeding, or at each breast change if nursing.
• White noise: The sound of a fan, rainfall, or a dedicated white-noise machine can calm the nervous system. Match the volume roughly to the baby's cry, then gradually reduce it.
• Skin-to-skin contact: Holding your baby against your bare chest regulates their temperature and heart rate and can shorten crying bouts.
• A walk or drive: Rhythmic motion in a pram or car seat provides gentle vestibular stimulation that many colicky babies find calming.

Tracking colic with Bebblo

When everything feels chaotic, a log is your ally. By recording each crying episode in Bebblo — start time, duration, and what you tried — you can start to spot patterns: does the crying peak at the same hour each evening? Does a walk help more than white noise? Does it correlate with a particular feeding?

That data is also useful at your next pediatrician visit, where the doctor can review the actual history instead of relying on memory.

When to call the doctor

Colic resolves on its own, but some symptoms warrant a call to your doctor right away:

• Fever above 38°C (100.4°F) in a baby under 3 months.
• Vomiting that is forceful or green/yellow in colour.
• Blood in the stool or a significant change in stool colour.
• Poor weight gain or signs of dehydration (fewer than 6 wet nappies a day).
• The crying pattern suddenly changes or feels different from before.

Also: if you or your partner feel overwhelmed, exhausted, or unable to cope, reach out to your health visitor, midwife, or GP. Parental wellbeing is not a luxury — it is part of caring for your baby.

This article is for general information only. It does not replace professional medical advice. Always consult your pediatrician if you have concerns about your baby's health.

Frequently asked questions

What is colic in babies?

Colic is defined by the "rule of 3": crying for more than 3 hours a day, more than 3 days a week, for more than 3 weeks in an otherwise healthy baby. It typically peaks around 6 weeks of age and resolves on its own by 3–4 months.

What causes colic in newborns?

The exact cause is unknown, but likely contributors include an immature digestive system, trapped gas, overstimulation from the environment, and an imbalance in gut bacteria. It is not caused by bad parenting and is not a sign that something is seriously wrong.

How do I soothe a colicky baby?

Effective strategies include the 5 S's (swaddle, side/stomach position while held, shush with white noise, swing with gentle motion, suck on a pacifier), bicycle legs to release gas, adjusting feeding position to reduce air intake, and skin-to-skin contact. No single method works for every baby — try a few and note which ones help.

When should I call the doctor about colic?

Contact your doctor if your baby has a fever above 38°C (100.4°F), vomiting, blood in the stool, poor weight gain, or if the crying pattern suddenly changes. Also seek help if you or your partner feel overwhelmed — support for parents is just as important as care for the baby.

Related Guides

• Colic Baby Remedies: Evidence-Based Soothing Techniques
• Baby Reflux and GERD: Symptoms, Causes, and What Actually Helps
• Why Is My Baby Crying? A Guide to Decoding Different Cries

Track crying with Bebblo

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