Normal 2-month-old baby eating breast milk exhaust should only have a faint odor, if the exhaust is very smelly to pay attention to the following situations: 1, to pay attention to the exhaust is very smelly at the same time more milk flaps, if this is the case to pay attention to the possibility of lactose intolerance, high lactose content in breast milk if there is lactose intolerance prone to poor digestion, increased intestinal gas, prone to exhaust more, exhaust smelly. 2, to pay attention to the possible existence of food Allergies, breastfeeding and the mother’s diet, if the mother ingested baby allergy-prone food, after eating breast milk will not digest well, increased gas accumulation in the gastrointestinal tract leading to very smelly exhaust. So the mother should avoid the intake of common allergens, such as milk, eggs, seafood, nuts, to avoid the symptoms of digestive tract.