Newborns always farting may be caused by physiological factors, indigestion, cold, lactose intolerance and so on. 1. Physiological factors: generally because the newborn baby is too fast when eating milk, resulting in the inhalation of a lot of air, the air needs to be discharged, thus causing farting. 2. Indigestion: Most of the time, it is caused by improper feeding, for example, overfeeding will easily lead to indigestion and bloating of newborns, which in turn will lead to farting. 3. Cold: If a newborn’s abdomen gets cold, it can easily lead to increased peristalsis and produce a lot of gas in the abdomen. 4. Lactose intolerance: it is often due to the lack of lactase or low lactase activity in the body of the newborn, and the inability to fully absorb lactose after breastfeeding, thus triggering the phenomenon. Newborn farting may also be caused by other reasons, if you exclude physiological factors, you need to go to the hospital for examination.