True vomiting is not a sign of colic. After all, breast-fed babies also get colic. They also believe that colic is not caused by gas. It may be hard to tell which came first, the gas or the colic, but they suggest that more often than not, a colicky baby has developed gas by swallowing too much air during crying spells. They add that prescribing anti-gas drops has not proven to be a very effective way to treat colic.
Many doctors think that colic is due to the baby's own temperament.
Some babies just take a little bit longer to get adjusted to the world, or a day and night cycle. This is perfectly normal, and the colic will go away. There are some things you can do for your colicky baby that may make life easier for both of you during those crying spells. First, make sure your baby is not hungry. If he isn't, don't continue trying to feed him.