The causes of a 6-month-old baby’s abdominal exhaust that is more smelly are mainly caused by the following conditions. First, due to the normal physiological phenomenon of children, because the diet of 6-month-old children is based on drinking milk, whether drinking infant formula or eating breast milk. These diets are protein-based, which can cause the abdominal exhaust to be more smelly. Secondly, symptoms caused by indigestion, if a 6-month-old child drinks milk significantly more than the gastrointestinal tract burden, coupled with the addition of too many complementary foods, it will cause indigestion in children, thus causing abdominal exhaust more smelly, and even children will have symptoms such as indigestible food or milk flaps.