Different diseases do hyperbaric oxygen, the course of treatment is different, as follows: 1, gas poisoning: hyperbaric oxygen can generally be a course of treatment, will improve the symptoms; 2, traumatic brain injury: more serious cases, coma, impaired consciousness, cognitive dysfunction, etc., need a longer time, it is recommended that at least 3 courses of treatment, a course of 10 days, that is, about 30 days; recovery is very good can end earlier, recovery is not good can be extended again; 3, brain disease: the best treatment effect is within 3 months, or even within 6 months, you can do a few more courses, but it is recommended that more than this point in time.