Millet usually does not cause constipation, may be insufficient water, lack of exercise, indigestion, intestinal polyps and other causes. Millet is a more nutritious food, rich in B vitamins and dietary fiber, can provide the body with a variety of nutrients to supplement the energy, daily eating millet in moderation, usually does not cause constipation, may be the following reasons for constipation. 1. Insufficient water: due to the lack of water in the intestinal tract, fecal dryness caused by constipation. 2. Lack of exercise: usually lack of exercise causes intestinal peristalsis to slow down, feces retention in the intestinal tract, become dry, not easy to discharge induced constipation. 3. Indigestion: bad eating habits, such as overeating or eating spicy and stimulating food to increase the burden on the stomach, inducing indigestion, resulting in slowing down of gastrointestinal peristalsis caused by constipation, accompanied by abdominal bloating, nausea and other symptoms. 4. Intestinal polyps: intestinal polyps, polyp diameter is relatively large, fecal discharge obstruction caused by constipation. Constipation, there are other reasons (such as irritable bowel syndrome, intestinal malignant tumors, etc.), it is recommended to find out the cause of the disease, and follow the doctor’s instructions for treatment.