In recent days, some family members and friends of vegetative patients have asked me some questions online about the promotion of waking of vegetative patients. I found that many vegetative patients did not use hyperbaric oxygen therapy before they became vegetative, or even did not know that there was such a treatment method as hyperbaric oxygen. After they become vegetative, they also do not use hyperbaric oxygen in a timely, adequate and scientific manner. In fact, hyperbaric oxygen therapy works best for several diseases: carbon monoxide poisoning, extremely delayed encephalopathy, traumatic brain injury and other causes of coma, dementia, and vegetative state. Coma, dementia, and vegetative disease caused by self-hanging, drowning, and electric shock injuries. There are also vertigo, sudden deafness and tinnitus. It is very effective for coma, dementia, and vegetation caused by traumatic brain injury in car accidents. Sadly, many neurosurgeons and neurologists do not recommend this good method to patients in time for both rapid recovery and saving them money, resulting in half the effort, and many patients who should not be vegetative become vegetative. Some studies have shown that if a traumatic brain injury patient starts hyperbaric oxygen therapy about two weeks after surgery, the rate of waking up a vegetative person can be doubled.