Sigmoid curvature is a “b” shaped curvature, which is commonly found in the sigmoid colon. If the bend is excessive, it may affect bowel movement. The human colon includes the ascending colon, transverse colon, sigmoid colon, descending colon, the shape of the sigmoid colon is in the shape of “B”, the sigmoid colon, if the excessive curvature will affect defecation, which will lead to constipation, and the patient will have abdominal distension and other clinical discomfort. Sigmoid curvature is heavier, usually need to eat a light diet, you can eat more fresh vegetables and fruits, you need to drink more water, after eating, you need to appropriate activities, can promote the digestion of food and inhalation, sometimes you can take oral laxative effect of drugs, help to prevent constipation.