The possible causes of brain hemorrhage or drowsiness in three months are the larger amount of bleeding and the deeper part of the hemorrhage. 1. Larger amount of bleeding: the larger the amount of bleeding in the brain, the longer it takes to absorb the hematoma, and the greater the toxic effect of the hematoma on the brain tissue, so the patient needs a longer recovery time, and the patient will have a long period of drowsiness during the recovery time. 2. Deep hemorrhage site: If the hemorrhage is from the brainstem or the hemorrhage is large and breaks into the ventricle, it may damage the brainstem upstream reticular activating system, which is related to the sleep-wake cycle, and once damaged, it may cause long-term drowsiness of the patient, and at the same time, the hemorrhage site may have long-term low perfusion, which will also affect the sleep-wake cycle and cause long-term drowsiness. After cerebral hemorrhage, when the patient’s vital signs are stable and the condition does not continue to progress, rehabilitation should be carried out at an early stage to improve the patient’s quality of life.