If it is only a shallow coma, consciousness will be restored after a week or so of good treatment, and it is possible to wake up. If the coma is caused by cerebral hypoxia, it depends on what causes the cerebral hypoxia and the degree of the coma. If the hypoxic factors can be removed and treated actively, the treatment effect will be better by applying nutritional brain cells and then treating with hyperbaric oxygen. If the condition is serious, whether it can wake up is still a big problem. With the improvement of the recovery of hypoxia, it can wake up in about 2-4 weeks, but some of the brain hypoxia is very serious after the change, long time consciousness impairment may never wake up and form a vegetative state, the patient should be prepared to wake up in any way.