Three-month-old babies farting with feces is usually a normal phenomenon. It should be cleaned up in time to prevent the anal skin from breaking. If farting with more feces, other reasons such as indigestion cannot be ruled out, and prompt medical attention is recommended. The anal sphincter muscle of babies is in the developmental stage, because the anal sphincter muscle of babies is more loose, the stool is more dilute, so the situation of farting with feces will occur. Farting with feces is easy when the anal sphincter is loose, and will gradually return to normal as the baby grows and develops. Of course, if the stools are thin and frequent, indigestion cannot be ruled out and should be treated with probiotics. Farting with feces can easily accumulate around the anus and cause serious damage to the anal skin. So we should use paper towel or water to clean up and apply petroleum jelly to protect the anal skin of the baby.