Bananas can assist in defecation, but no pass effect. Bananas are rich in dietary fiber and water, appropriate eating bananas can increase the volume of feces, but also promote intestinal peristalsis, for mild constipation has a certain auxiliary effect, can help defecation, but no laxative effect. Constipation can be appropriate to eat bananas, can help defecation, but avoid excessive consumption. If the constipation is more serious, purely through food regulation can not play a role in alleviating the role, need to actively cooperate with the doctor to take laxative drugs, such as lactulose, compound aloe vera capsules. The above drugs should be used under the guidance of a professional physician. And when constipation is serious, you must be instructed by a doctor to use medication.