Bed sores are medical terms for pressure sores and pressure injuries, and as the name implies, they are lesions that occur when local tissues are compressed for a long period of time, most often in areas with elevated bones such as the buttocks, head and pillow, and back of the shoulder. Many elderly people who have had strokes or are in poor health are prone to bed sores when they lie in bed for long periods of time. Elderly people with bedsores should pay attention to the following prevention: 1. Turn over regularly, once every 2 hours, and you can turn over 30° on the left and right side; 2. Use sponge pads, water beds, air beds, and foam pads in the parts of the joint bulge; 3. Scrub regularly, perform massage, keep dry and ventilated, and increase nutrition. Pressure sores can be divided into four stages, and common treatments are as follows: 1. bruising and redness stage: reducing pressure is sufficient; 2. inflammatory infiltration stage: local tissue blisters appear, which can be treated with topical drugs; 3. superficial ulcer stage and necrotic ulcer stage: active hospitalization should be provided.