Oral mannitol is able to treat constipation. Mannitol is a hypertonic medication that has some diarrhea-inducing effects when taken orally. If constipation occurs, you can use mannitol under the guidance of a doctor to help excrete. After oral mannitol, you need to drink the right amount of water, mannitol can not be absorbed by the body, the formation of hypertonic state in the intestine, adsorption of water, relieve the symptoms of constipation. Short-term constipation can be appropriate use of mannitol diarrhea, if long-term use, may lead to dependence on mannitol. Mannitol should not be used too much at a time, and should be used under the guidance of a doctor to avoid more severe abdominal pain, intestinal perforation, intestinal obstruction and other adverse reactions. Oral mannitol is able to treat constipation, but for the treatment of constipation, it is important to adjust the diet, drink more water, appropriate exercise, can not rely too much on mannitol. Consult your physician for specific advice.