After diarrhea a few days are not defecation is a normal phenomenon, may be due to diarrhea during the diet is too small or taking drugs to treat diarrhea and so on. 1. During diarrhea, due to gastrointestinal discomfort, the amount of diet may be reduced, gastrointestinal excreta due to a certain amount of less than effective stimulation of the bowel reflex to cause defecation, defecation will be delayed. 2. During the period of diarrhea, patients may take some antidiarrheal drugs to treat diarrhea, such drugs will reduce the peristalsis of the gastrointestinal tract, which will weaken the excretory function and slow down the defecation speed. When the above phenomenon occurs, you can eat some food containing more fiber to restore the excretory function, if there are no other abnormal symptoms, there is no need for special treatment. If there is any discomfort, you need to go to the hospital as soon as possible, and the doctor will formulate an individualized diagnosis and treatment plan according to the specific condition, so as to avoid delaying the condition.