The timing of hyperbaric oxygen therapy for cerebral hemorrhage is recommended to be performed early after the condition is stabilized. Generally, hyperbaric oxygen therapy can be started about 2-3 weeks after cerebral hemorrhage. The advantages of hyperbaric oxygen therapy are: 1. Hyperbaric oxygen can reduce the cerebral edema caused by cerebral hemorrhage, which can relieve the increase of intracranial pressure. 2. Hyperbaric oxygen is also beneficial to ensure the blood oxygen content of the body and increase the distance of tissue capillary diffusion, so as to correct the state of brain tissue hypoxia. 3. 4.Hyperbaric oxygen has a certain role in reducing the oxygen free radical damage caused by cerebral hemorrhage.