Eating purple potatoes does not cause constipation. Purple potatoes are rich in dietary fiber, and dietary fiber can play a role in promoting gastrointestinal peristalsis, accelerate the digestion of food and the absorption process, can be conducive to promoting the discharge of feces, constipation has a certain effect, so eat purple potatoes not only does not cause constipation, but also help to promote the bowel movement. Constipation can be divided into functional and organic constipation, functional constipation is generally caused by poor eating habits, lack of exercise and other factors, while organic constipation is usually due to intestinal obstruction, anal fissure and other diseases. If constipation cannot be relieved by diet and exercise, it is recommended to go to the hospital to get a clear picture of the cause of the problem.