Baby colic (also known as infant colic, three-month colic, and infantile colic) is a condition in which an otherwise healthy baby cries or screams frequently and for extended periods without any discernible reason.
The condition typically appears within the first three weeks of life and almost invariably disappears, often very suddenly, before the baby is three to four months old. It is more common in bottle-fed babies, but also occurs in breast-fed infants. The crying frequently occurs during a specific period of the day, often in the early evening.