Answer: Baby colic, also known as infantile colic, is defined as episodes of crying for more than three hours a day, for more than three days a week, for three weeks in an otherwise healthy child. Often crying occurs in the evening. ... The cause of colic is unknown.
A baby who has colic often cries about the same time every day, usually in the late afternoon or evening. Colic episodes may last from a few minutes to three hours or more on any given day.
Consider offering her a pacifier, or encourage your baby to suck on her finger by gently putting it in her mouth. Gas doesn't cause colic, but some colicky babies also suffer from gassiness because they tend to swallow air while crying. Keep your baby upright during feedings, and burp him often to try to ease gas pain.
Your baby may calm down if you:
Lay him on his back in a dark, quiet room.
Swaddle him snugly in a blanket.
Lay him across your lap and gently rub his back.
Try infant massage.
Put a warm water bottle on your baby's belly.
Have him suck on a pacifier.
Soak him in a warm bath.