Neurological symptoms can appear alone or accompanied by pain. More than 50% patients with decompression sickness have symptoms of nervous system, and diving with underwater respirator is more common than diving with caisson or traditional protective helmet. Symptoms and signs of the nervous system vary greatly, from sensory abnormalities to serious brain problems. Vestibular involvement can cause severe dizziness, which is difficult to distinguish from external lymphatic fistula. Early superficial symptoms (such as limb weakness or numbness) can have serious consequences such as hemiplegia. If the treatment is delayed or improper, the consequences will be irreversible. Sometimes the initial injury is too serious, even if it is treated quickly and properly, it is ineffective. But repeated treatment with hyperbaric oxygen seems to help. The prognosis of spinal cord injury caused by decompression sickness is better than other causes. In severe cases, compression therapy can only rule out bubble embolism, and sometimes it is difficult to solve secondary biochemical changes and dysfunction. As an adjuvant therapy, drugs should generally be given immediately when decompression cases occur. Commonly used drugs include low molecular dextran, plasma, physiological saline and other blood dilators, which can not only dilate blood, but also inhibit platelet adhesion and aggregation and reduce the activity of platelet factor, thus preventing blood coagulation and improving symptoms and signs. For example, low-dose aspirin can inhibit platelet aggregation and release. Adrenal corticosteroids can restore the normal permeability of blood vessels, reduce plasma exudation and relieve brain and spinal cord edema. According to the condition, dopamine, aminophylline and Xidi can be used for symptomatic treatment. Develop good hygiene habits and establish a reasonable living system. Take a full rest before work to prevent excessive fatigue; Don't drink, drink less water. When working, be cold and damp-proof. After work, you should immediately take off your wet work clothes, drink hot tea, take a hot bath and rest in a warm room for more than half an hour to promote blood circulation and accelerate the discharge of excess nitrogen from your body. The daily diet should be high in calories (generally about 15072 ~ 16747 kj), high in protein and medium in fat, and various vitamins should be appropriately added. Recently, domestic experiments with rabbits showed that vitamin E can prevent or alleviate experimental decompression sickness, which may be due to preventing or reducing the release of bioactive substances such as 5- hydroxytryptamine in platelets, thus not causing intravascular bleeding.