Constipation drink mannitol method is, in 125mL 20% mannitol add 250mL warm water, in 30min finished, 6 ~ 8h if still not defecate, can be repeated 1 time. Mannitol can directly act on the intestine, increase the osmotic pressure in the intestine, thus forming a hypertonic environment, which can stimulate intestinal peristalsis, soften stools, and can effectively promote patients’ defecation. In addition, the efficacy of mannitol in the intestinal tube is longer, which can increase the patient’s defecation volume and make defecation more complete. The treatment of constipation can also be used hemp pill, senna and many other drugs. Constipation must be treated promptly after it occurs, otherwise it may cause anal fissure. If medication is needed, it must be used as prescribed by the doctor.