If a newborn baby farts a lot and is very smelly, it is mostly an abnormal phenomenon. The reason why newborns fart a lot and smell very bad is mainly due to the following two conditions: 1. caused by indigestion, because the digestive function of newborns is very fragile, in the case of eating too much milk will lead to ineffective digestion, thus leading to indigestion. The newborn often has bad breath and a thick, greasy tongue, and farts a lot and smell very bad. 2, caused by bacterial enteritis, if the newborn has bacterial enteritis, there will also be a lot of moisture and very smelly symptoms, in this case, the need to give the newborn timely anti-infection treatment. So either case is a pathological phenomenon that needs to be dealt with promptly.