Under normal circumstances, children occasionally have anal discharge, but anal discharge is only a faint odor, not very smelly. If the child’s anal discharge is very smelly, it means that there is an increase in the accumulation of gas in the intestines, and there is a significant increase in the amount of gas containing hydrogen sulfide in the anal discharge, so it is very smelly. In this case, it is often considered that the child has digestive problems, commonly caused by poor diet, poor absorption, but also may be the child in the disease factors intestinal micro-ecosystem is out of balance, digestive function further decline. In addition, some children may have food allergies, or food intolerances, which can also significantly reduce digestion and absorption. Of course, some children with weak physique and poor spleen and stomach function may also experience the above situation.