New Moms
Colic: Signs, Causes, and What Actually Helps
The 'rule of threes' doctors actually use to describe colic, what's known and not known about what causes it, what the evidence says helps, and the signs that mean it isn't colic at all.
Colic is generally described using the 'rule of threes': crying for three or more hours a day, three or more days a week, for three or more weeks, in a baby who's otherwise healthy and gaining weight. Doctors don't know exactly what causes it — an immature digestive system, gut bacteria, and feeding patterns are all suspected contributors, but no single cause explains every case. There's no proven cure; a consistent routine, movement, and a pacifier help some babies, over-the-counter gas drops haven't held up well in research, and the reliable news is that colic almost always resolves on its own by three to five months.
Colic is one of the more frustrating newborn-stage terms, because it describes a pattern rather than explaining a cause — parents get a label for the crying without a fix to go with it. Here's what the term actually means clinically, what's genuinely known about it, and where the line is between colic and something worth a call to your pediatrician.
The rule of threes
Pediatric sources, including Mayo Clinic, generally define colic as crying for three or more hours a day, on three or more days a week, for three or more weeks, in a baby who is otherwise healthy, feeding well, and gaining weight normally. Colicky crying tends to cluster in the late afternoon or evening, often comes with a red face, clenched fists, and legs pulled up toward the belly, and is notably hard to soothe — you're doing the usual things and none of them are working.
Colic is a diagnosis of exclusion
A pediatrician generally reaches "colic" by first checking that nothing else explains the crying — feeding problems, reflux, an infection, or another medical cause. If your baby's crying pattern is new or has changed, it's worth a visit rather than assuming colic on your own.
What might cause it (nobody knows for sure)
- An immature digestive system that's still learning to handle normal gas and motility.
- An imbalance in developing gut bacteria, though the research connecting this to colic specifically is still limited.
- Feeding too much, too fast, or not burping enough, which can trap air.
- Overstimulation — some babies cry more in the evening simply from a full day of sensory input catching up with them.
What the evidence actually says helps
| Approach | What's actually known |
|---|---|
| A consistent daily routine | Predictable feeding, sleep, and activity timing is a commonly recommended first step, though it doesn't work for every baby. |
| Movement (rocking, a stroller walk, a car ride) | Widely reported to soothe colicky crying in the moment; no single motion works universally. |
| A pacifier | Sucking has a genuine calming effect for many babies and is a reasonable first thing to offer. |
| Simethicone (gas drops) | Popular and widely sold, but hasn't held up as effective for colic in research. |
| Gripe water | Ingredients and quality vary by brand, and evidence of benefit is limited — check with your pediatrician before using any product marketed for colic. |
| Time | In most cases, colic resolves on its own by around 3 to 5 months, regardless of what's tried. |
When it's not colic — call your pediatrician
These aren't typical colic and warrant a call
A fever in a young infant, forceful or repeated vomiting, blood in the stool, a swollen or hard belly, poor weight gain, a baby who seems limp or unusually hard to wake, or crying that suddenly changes in character or intensity are reasons to call your pediatrician rather than assume it's colic. Arching the back or pulling away during and right after feeds can also point to reflux rather than colic — worth mentioning at a visit.
Taking care of yourself during a colic stretch
It's standard pediatric advice, not a failure, to put your baby down in a safe place — a crib, on their back — and step out of the room for a few minutes if the crying has you at your limit. A calmer parent returning after a short break soothes a baby better than an exhausted one white-knuckling through it. Colic is genuinely one of the harder newborn stretches, and it passes.
If bottle feeding is part of your routine, our comparison of anti-colic and regular baby bottles covers the venting systems some parents find helpful for gas-related fussiness. And if the crying is bunched into a predictable evening stretch tied to feeding, that may be cluster feeding rather than colic — the two get confused often.
Frequently Asked Questions
Is colic caused by something I'm doing wrong?
No. Colic isn't caused by a parenting mistake, and there's no evidence it's linked to how a baby is fed, held, or cared for. It's a frustrating, poorly understood pattern that happens in otherwise healthy, well-cared-for babies.
Do anti-colic bottles cure colic?
No — they're designed to reduce swallowed air, which can ease gas-related fussiness for some babies, but colic is broader than gas alone and an anti-colic bottle isn't a guaranteed fix.
Does gripe water actually work?
The evidence supporting gripe water for colic is limited, and ingredients and quality vary a lot between brands, since it isn't tightly regulated the way medications are. Check with your pediatrician before giving your baby any product marketed for colic.
How is colic different from reflux?
Both can cause a lot of crying, but reflux often comes with arching the back or pulling away during or right after feeds, and frequent forceful spit-up, while colic crying is less tied to the feeding moment itself. If you're not sure which you're seeing, it's worth describing the pattern to your pediatrician rather than guessing.
Will colic cause lasting digestive or health problems?
There's no evidence that colic leads to lasting digestive or developmental issues once it resolves, which it almost always does by 3 to 5 months.
Sources & Further Reading
- Colic - Symptoms & causes — Mayo Clinic (reviewed 2026-08-15)
- Colic Relief Tips for Parents — American Academy of Pediatrics (HealthyChildren.org) (reviewed 2026-08-15)
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Mom's Magazine Editorial Team
Editorial Team
The Mom's Magazine editorial team researches and writes practical, plainly-sourced guidance for parents and families. Guides are reviewed for accuracy and updated as recommendations change. Where a topic calls for professional expertise, we cite reputable organizations and, for health topics, add a qualified reviewer before publishing.
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