Weakness after defecation may be caused by physiological factors such as long defecation time and improper posture, or it may be caused by diseases such as diabetes and hyperthyroidism. 1. Physiological factors: usually too long defecation time or defecation posture when the human body will consume more energy, so that the symptoms of weakness after the stool, is a normal physiological phenomenon. 2. Pathologic factors: (1) Diabetes mellitus: It is mainly considered to be related to the environment, heredity, autoimmune deficiency and other factors. Diabetes mellitus patients often have the symptoms of polydipsia, polyphagia, polyuria and weight loss, which may be accompanied by generalized symptoms such as fatigue, and some of the patients may also show fatigue after bowel movement. (2) Hyperthyroidism: Patients often have symptoms such as excessive sweating, fatigue, fear of heat, agitation, etc., which may also be manifested as weakness after bowel movement. It is recommended that when the symptoms of post-stool weakness occur, physiological factors should be ruled out first, and if the symptoms are caused by disease factors, it is necessary to consult a doctor in a timely manner to clarify the specific causes.