Eating bananas when constipated has a certain effect. Bananas contain more dietary fiber, and the vast majority of these dietary fibers are not absorbed by the intestinal tract insoluble dietary fiber, can play a role in promoting intestinal peristalsis, so bananas for the relief of constipation has a certain effect. However, constipation may be caused by functional and organic diseases, intestinal system lesions, psychoneurological disorders, or drug side effects can make the patient appear constipation, although the banana can relieve constipation, but can not achieve the therapeutic effect, but also need to carry out formal treatment. Although bananas have the effect of helping defecation, but the effective dose of daily consumption intake is limited, the emergence of constipation, it is recommended that under the guidance of the doctor for formal treatment.