Two month old babies always fart (exhaust), may be related to physiological factors, may also be due to lactose intolerance, milk protein allergy and other reasons. 1. physiological factors: for example, two-month-old babies are in a low-temperature environment for a long time, parents do not pay attention to keep the baby warm, resulting in a cold abdomen, may cause the phenomenon of always venting. 2. Lactose intolerance: some two-month-old babies have lactase enzyme deficiency or insufficient secretion, resulting in the inability to digest and absorb lactose in food, resulting in lactose intolerance, which may lead to constant flatulence and may be accompanied by bloating, diarrhea and other manifestations. 3. Milk protein allergy: some two-month-old babies, due to genetic factors, incomplete development of the immune system and other reasons, are likely to have a milk protein allergy, which may always show the phenomenon of exhaust, may also be accompanied by diarrhea, vomiting and other symptoms. Two month old babies always farting, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.