Common causes of constipation are the following reasons: First, unreasonable dietary habits, resulting in insufficient water in the diet, and insufficient fiber intake, so that the feces in the intestinal tract stay longer, dry feces, difficult to discharge. Second, insufficient exercise, due to the impact of disease or medical brake, as well as the impact of drugs, and cause intestinal motility retardation, resulting in constipation. Third, long-term use of laxative drugs, resulting in drug dependence, once stopped, then constipation may occur. Fourth, organic changes, such as intestinal obstruction, neurological diseases, systemic diseases, and perianal diseases can often lead to constipation. Fifth, old and frail, defecation weakness. Old and frail, bedridden, maternal, pregnant women, as well as people with too little activity, often due to the diaphragm, abdominal muscles, anal sphincter contraction force is reduced, abdominal pressure is reduced, so that defecation power is insufficient, resulting in the easy elimination of feces, constipation occurs. Sixth, changes in lifestyle habits, improper defecation posture, etc., can cause a decrease in the sensitivity of the rectal reflex, so that the defecation reflex can not produce and cause constipation. Seven, bad habits, lack of sleep, continuous high tension, mental state, etc., can also cause peristaltic malfunction and spastic contraction of the colon, and cause constipation.