Three months baby fart more and stink may be due to indigestion, may also be due to premature addition of complementary foods, and may be due to acute gastroenteritis. 1. indigestion: three months baby drink is milk powder, milk powder brewing too thick can lead to the baby indigestion, this time not fully digested protein will be in the intestinal tract and produce ammonia, and then appeared three months baby fart more and stink phenomenon. 2. too early to add complementary foods: too early to add complementary foods can also lead to the baby can not digest the food intake, which leads to the phenomenon of three-month-old baby farts and stink, this situation should stop complementary feeding, three-month-old babies still need to breastfeeding or formula feeding. 3. Acute gastroenteritis: If the baby is cold and suffers from acute gastroenteritis, the phenomenon of three-month-olds farting a lot and stinking will also occur. If your three-month-old baby has the symptoms of farting a lot and stinking, it is recommended that you consult a doctor in time to find out the cause, so as not to delay the condition.