Excessive crying usually occurs at the same time every day: Although colic can happen at any time, day or night, most babies experience it later in the afternoon or at night, and it will usually happen at the same time on most days.

Why does colic only happen at night?

(One reason colicky babies can fuss more at night, he explains, is that serotonin levels peak in the evening.) This imbalance, the theory goes, naturally resolves when babies start making melatonin, which relaxes intestinal muscles.

How do I know if its colic?

A healthy baby may have colic if he or she cries or is fussy for several hours a day, for no obvious reason. Colicky babies often cry from 6 p.m. to midnight. Colicky crying is louder, more high-pitched, and more urgent sounding than regular crying. Colicky babies can be very hard to calm down.