Elderly people with rotten buttocks may be due to malnutrition or long-term compression, and can be improved by applying external dressings or adjusting living habits and changing medication. 1. External dressings: the elderly buttocks rotten may be due to the body local long-term compression, so that the blood circulation is not good, the tissue under the skin lack of nutrition. Can be under the guidance of the doctor, the treatment of external dressings, can use iodine-containing dressings, alginate dressings, etc., can be oozing liquid absorption, promote wound healing. 2. Adjustment of living habits: To adjust living habits, such as good skin management, keep the local skin clean and dry, etc., to improve through a balanced diet and other ways. 3. Medication change: mild breakouts can be treated with ointment containing silver ions or iodophor. After the ulceration heals, drugs such as sodium heparin ointment can be used to promote blood circulation. For severe ulcers, local debridement, disinfection and surgery should be performed to promote healing, and it is necessary to go to the hospital for consultation and regular medication changes to avoid infection.