Eating sweet potato is good for constipation, sweet potato itself has the effect of laxative, spleen and Qi. Sweet potatoes contain more fiber, can absorb water in the intestine, increase the volume of stool, thus promoting the discharge of stool, so it is effective in relieving constipation. In addition, constipation patients can not rely solely on sweet potatoes to solve the problem, if excessive consumption of sweet potatoes may aggravate the problem of constipation. Excessive consumption of sweet potatoes, because the starch content in sweet potatoes is relatively high, too much consumption can lead to abdominal discomfort, increase the burden on the gastrointestinal tract, resulting in slowing peristalsis in the intestines, may appear constipation. So eat sweet potatoes can not be excessive, especially according to individual differences to decide, constipation patients also need to be integrated through diet and exercise to regulate.