No one knows what causes colic, the intense pain and stomach cramping that commonly begins in otherwise healthy infants at about a month and disappears a few months later. But now researchers have found a possible explanation: the kinds of microbes that inhabit babies' intestines.
Researchers at Radboud University and Wageningen University in the Netherlands collected nine stool samples from each of 12 colicky babies and 12 age-matched babies without colic over their first 100 days of life. All the babies and mothers were healthy. But as early as the first weeks, the scientists found significant differences in the intestinal microbes of colicky and non-colicky babies.