Bloating after defecation may be caused by constipation, indigestion, intestinal flora imbalance and other reasons, and should be treated promptly by a doctor. 1. Constipation: usually due to drinking too little water or not timely bowel movement caused by dry stools, thus triggering constipation, the patient did not completely discharge the feces during defecation, which led to the phenomenon of abdominal distension after defecation. 2. Indigestion: usually due to poor dietary habits lead to gastric smooth muscle contraction function is weakened, so that the food and food produced by the accumulation of gas in the stomach can not be discharged in a timely manner, thus appearing after defecation abdominal distension phenomenon. 3. Intestinal flora imbalance: it may be due to the abuse of antibiotics, resulting in part of the flora is inhibited or eliminated, or overeating caused by the gastrointestinal flora imbalance. Bloating after defecation may also be caused by gastritis, and it is recommended that patients seek timely medical diagnosis. In daily life, we should pay attention to balanced nutrition and eat less spicy and stimulating food.