Coarse grains eat more generally will not appear constipation, coarse grains contain more fiber, can supplement the body a large amount of fiber to increase the dissolution of stool, promote intestinal peristalsis, promote defecation, make bowel movements more regular, usually will not appear constipation. Constipation is generally eaten too fine, and less exercise, more water absorption, gastrointestinal power is poor, more time to stay in the body will appear constipation. The usual diet to avoid spicy and irritating food, will also stimulate the intestinal tract to slow down intestinal peristalsis, and the intestinal flora will also lose balance constipation, usually drink more water will help defecation.