Common myths of infancy
Truth: Colic is remarkably common from birth to three months. "Parents, often because they're frustrated, will just start changing formulas willy-nilly," McEvoy said. "It has no basis in science." Changing formula can actually exacerbate the problem, causing constipation, vomiting, or diarrhea. There's one exception -- infants who have a diagnosed milk allergy and thus need special formula.