Colic usually goes away by 3 months of age. A baby's fussiness may not be colic at all. The first thing to do is look for signs of illness. Colicky babies have a healthy sucking reflex and a good appetite. Sick babies may appear colicky but won't have the same strong sucking reflex, and they'll also drink less milk.
Colicky babies like to be cuddled and handled.
Colicky babies may spit up from time to time, but if your baby is actually vomiting , you should call the doctor. True vomiting is not a sign of colic. Doctors now believe that colic is rarely, if ever, caused by a milk allergy. After all, breast-fed babies also get colic. They also believe that colic is probably not caused by gas.