Most of the brain stem hemorrhage has no signs before, a few patients, may appear headache, dizziness and other symptoms. 1. Most of the brain stem hemorrhage before, there is no sign, because the brain stem hemorrhage is a kind of emergency, once the bleeding, often directly will cause the patient’s limb hemiplegia, impaired consciousness coma, etc., and seldom have the gradual symptom performance. 2. Only a small number of people may have certain signs. For example, a certain amount of dizziness and lightheadedness, etc., but often not obvious, many patients may be ignored. It should be noted that brain stem hemorrhage may be preceded by triggers, such as emotional excitement, straining to defecate, lifting heavy objects, etc., which may result in an increase in blood pressure and ultimately cause brain stem hemorrhage. Therefore, controlling blood pressure is of great value in preventing cerebral hemorrhage including brainstem and other parts of the brain.