When skin ulcers appear, the first thing to do is to prevent secondary infection, do not blindly use external medicine to treat, you can do professional surgical examination, according to the condition to take the cause of treatment. If it is allergic, cut off the allergens; if it is caused by diabetes, pay attention to the control of blood sugar; if it is physicochemical damage, try to stay away from the causative source and try to eliminate the causative conditions. Allergen test or other related tests can be done, and treatment should be taken according to the test. Clean and disinfect the wound, remove necrotic tissue, scar, old granulation tissue, foreign body, etc. Rinse with hydrogen peroxide, Neosporin, saline, iodophor, and use 3% hypertonic saline wet compress for severe local edema. According to the results of bacterial and fungal culture and examination, anti-inflammatory drugs such as anti-allergic drugs, anti-parasitic drugs, antibiotics, and drugs to promote ulcer healing are then selected. Calcium and vitamin C supplements can be used to improve body resistance and correct anemia or hypoproteinemia. For those with large ulcers and long-term unhealed medication changes, surgical treatment is required if accompanied by exposed bones, joints, tendons or plates. It is important to keep the area clean, mainly hygienic and well ventilated, clear the wound according to medical advice, disinfect it and apply muscle-generating and skin-nurturing cream. Do not eat spicy food.