The most common main clinical manifestation of thrombosis is the sudden swelling of one limb. Patients suffering from superficial vein thrombosis present with a reddened, low-heat cord in the superficial vein, with localized pain that increases with walking. In mild cases, the localized heaviness is only felt, and the symptoms are aggravated when standing. Patients who have been bedridden for a long time are one of the causes of static thrombosis, so we should raise awareness to prevent it in advance. 1.Open windows for ventilation every day, keep the room quiet and clean. 2, eat low-fat vitamin-rich easy-to-digest food, eat more fresh vegetables and fruits, such as: tomatoes, onions, mushrooms, celery, kelp, black fungus, etc. These foods are rich in pyrazine, which is good for diluting blood and improving blood viscosity. Avoid eating greasy, spicy and other stimulating foods. 3.Living a regular life, prohibit smoking or stay away from smoking environment. 4.Do clockwise circular massage of the abdomen every day, develop the habit of regular bowel movement and keep the bowels open. 5, drink more water every day, drink at least 1500-2000ml of water.