After eating is good or bad need to be divided into cases, if physiological factors caused by the normal phenomenon, if it is acute gastroenteritis, intestinal flora imbalance, hyperthyroidism and other disease factors caused by the abnormal, is not good, need to give the appropriate treatment. 1. Physiological factors: the time of defecation will depend on the individual’s defecation habits, part of the population after eating will appear to want to defecate performance may be related to the individual’s defecation habits, as long as there is no thin feces, feces water content increases, the number of defecation is greater than usual and other situations are generally normal. 2. Disease factors: acute gastroenteritis patients may have diarrhea, abdominal pain and other symptoms, especially after eating food contaminated by bacteria, viruses and other defecation performance; intestinal flora dysbiosis when the intestinal flora homeostasis is disrupted may have eaten on the pull of the abnormal defecation; hyperthyroidism can be high metabolism state, the performance of eat on the pull of the performance. Disease-induced are all bad cases. It is recommended to go to the hospital after eliminating physiological factors.