Hyperbaric oxygen therapy must be carried out in strict accordance with the relevant precautions, because after all, oxygen chamber safety is the most important aspect. Patients need to pay attention to the following points during hyperbaric oxygen therapy: 1. After a detailed physical examination by a hyperbaric specialist to assess whether the condition is suitable for hyperbaric oxygen therapy, and then after signing the consent form for hyperbaric oxygen therapy, come on time according to the appointment time; 2. Before the patient enters the cabin, the nurse or doctor will do detailed safety education with the patient to avoid bringing in flammable and explosive, such as lighters, cell phones and other electrically charged, flammable and explosive 3, the treatment process because to use drinking action, pinch nose swallowing action, it is recommended to bring a good mineral water or drinking water into the cabin before treatment; 4, treatment to avoid full meals or do not eat, fasting, also do not recommend eating easy to produce gas food. After entering the cabin, listen carefully to the hyperbaric oxygen doctor or nurse, be familiar with how to use the hyperbaric oxygen suction device and how to use the alarm or communication equipment during the hyperbaric oxygen therapy. During the treatment process, especially during the decompression phase, the pressure adjustment action should be done in a timely manner to avoid middle ear pressure injury, and any discomfort in the treatment process can be reported to the medical staff at any time to wait for instructions from the medical staff. They should be in good health, not in the period of disease attack, and pregnant women cannot enter the cabin.