Patients with traumatic subarachnoid hemorrhage should not exert themselves to defecate, otherwise it will easily induce rebleeding and aggravate the condition. When patients with traumatic subarachnoid hemorrhage hold their breath to defecate, the intra-abdominal pressure and intracranial pressure increase, the intracranial venous blood reflux is not smooth, and the blood pressure rises, which can make the original hemorrhage of the blood vessels rupture and bleed again, which is life-threatening. Because these patients need to be absolutely bedridden for 4 to 6 weeks during the acute stage, coupled with weakened intestinal peristalsis, environmental, psychological and other factors, patients are prone to constipation. Constipation-induced rebleeding is a fatal complication of subarachnoid hemorrhage. Patients need to keep the bowels clear, eat a light diet, high fiber diet, etc. If the patient has constipation or difficulty in defecation, should go to the hospital in time, under the guidance of the doctor to use Kesler, oral promotion of defecation drugs, do not force defecation.