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Published on: 3/2/2026
Most nonstop crying in an otherwise healthy young infant is often colic, a temporary pattern defined as crying more than 3 hours a day, more than 3 days a week, for at least 3 weeks, starting around 2 to 3 weeks and usually easing by 3 to 4 months. There are several factors to consider; see below to understand causes, what colic is not, and why this phase ends.
Medically approved next steps include proven soothing techniques, targeted feeding changes with your pediatrician’s guidance, select probiotics, and a calm routine, plus tracking symptoms and getting prompt care for red flags like fever, poor feeding, breathing trouble, or blood in stool. For complete, actionable details that could change your next steps, including when to call the doctor now, see below.
If you're asking yourself, "Why won't they stop crying?"—you are not alone. Few things are more exhausting and confusing than a baby who cries for hours and cannot be soothed. For many families, the answer is colic.
Colic is common. It is distressing. And it is very real. But it is also temporary.
Let's walk through what colic actually is, why it happens, what you can safely do, and when it's time to speak to a doctor.
Colic is defined medically as:
It typically begins around 2–3 weeks of age, peaks around 6–8 weeks, and usually improves by 3–4 months.
Babies with colic may:
The key point: colic is a pattern of crying in an otherwise healthy baby.
The honest answer? We don't know exactly.
However, research points to several contributing factors:
Newborns are adjusting to life outside the womb. Their nervous systems are immature. Some babies may simply be more sensitive to light, sound, or stimulation.
A baby's digestive system is still developing. Gas, intestinal movement, and feeding adjustments may contribute to discomfort—but colic is not caused solely by gas.
Some babies are naturally more sensitive or reactive. This is not a flaw. It is simply biology.
Babies are sensitive to stress in their environment. This does not mean colic is "your fault." It means a calm routine can sometimes help.
It is important to be clear:
Colic is not:
Colic does not cause long-term developmental harm. But it can take a toll on parents.
There is no guaranteed cure. However, certain medically supported strategies may reduce symptoms.
Pediatric research supports calming techniques that mimic the womb:
These techniques help regulate a baby's nervous system.
Speak to a pediatrician before making changes, but they may suggest:
Routine formula switching without medical advice is not recommended.
Some studies suggest certain probiotics (particularly Lactobacillus reuteri) may reduce crying time in breastfed infants. Evidence is mixed for formula-fed infants. Always ask a pediatrician before starting supplements.
Overstimulation can worsen colic episodes.
Not all crying is colic. Some conditions can look similar but require medical attention.
Contact a doctor promptly if your baby has:
If your baby has significant congestion, wheezing, or labored breathing accompanied by excessive crying, this could indicate a respiratory infection rather than colic—use this free Viral Bronchiolitis symptom checker to help assess whether your baby's symptoms match this common infant respiratory condition that requires medical evaluation.
Respiratory conditions can sometimes cause irritability that looks like colic but requires different treatment.
If anything feels severe, unusual, or life-threatening, seek urgent medical care immediately.
Let's be honest.
Colic is exhausting. It can:
This is normal.
Persistent crying is one of the most powerful stress triggers for humans. It is designed to demand attention.
If you feel overwhelmed:
If you ever feel at risk of losing control, call a trusted person or your pediatrician immediately. Shaking a baby can cause life-threatening brain injury, even in seconds.
You are not weak for needing support.
In most cases, no.
Colic:
It is a developmental phase.
Most babies outgrow colic by 12–16 weeks.
If you suspect colic:
Schedule a pediatric visit
Track crying patterns
Discuss feeding options
Ask about probiotics if appropriate
Create a support plan
Colic is real. It is disruptive. It can test your limits.
But it is temporary.
In the majority of cases:
If your baby is feeding well, gaining weight, and has a normal exam, colic—while miserable—is not dangerous.
That said, never ignore red flags. If symptoms seem severe, unusual, or life-threatening, speak to a doctor immediately.
When a baby won't stop crying, it can feel endless.
But colic follows a predictable timeline. It peaks. It fades. And it ends.
In the meantime:
You are not failing. Your baby is not broken. This is a hard phase—but it is a phase.
And if at any point you are unsure whether what you're seeing is colic or something more serious, speak to a qualified healthcare professional right away. Your instincts matter.
(References)
* Gelfand AA. Infant Colic: A State-of-the-Art Review. Pediatr Neurol. 2022 Jul;132:48-55. doi: 10.1016/j.pediatrneurol.2022.04.004. Epub 2022 Apr 20. PMID: 35687702.
* Johnson JD, Kruger E, Johnson T, et al. Infant Colic: The Etiology, Diagnosis, and Management. Children (Basel). 2022 Aug 23;9(9):1273. doi: 10.3390/children9091273. PMID: 36014415; PMCID: PMC9498226.
* Sung V, Nielson S, Johnson J, Johnson T, De Caprariis P, Gupta A. Management of Infant Colic: What Works? Children (Basel). 2021 Jun 24;8(7):527. doi: 10.3390/children8070527. PMID: 34208398; PMCID: PMC8304918.
* Lante T, Brusa J, Strisciuglio C, Fasano A. The Etiology and Treatments of Infantile Colic: The Possible Role of the Microbiome. Children (Basel). 2022 Aug 18;9(8):1233. doi: 10.3390/children9081233. PMID: 36011409; PMCID: PMC9407335.
* Xu M, Yin J, Sun H, et al. Pharmacological and non-pharmacological interventions for infantile colic: a systematic review and meta-analysis. Eur J Pediatr. 2021 Aug;180(8):2381-2396. doi: 10.1007/s00431-021-03991-6. Epub 2021 Mar 17. PMID: 33731802; PMCID: PMC8290209.
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