Many patients want to know what decubitus ulcers are and how to prevent and treat them in their lives. Decubitus ulcers are called pressure ulcers in English, and since they are a disease caused by pressure, our treatment principle is pressure relief. However, we tend to ignore this point in life. It is especially likely to occur in families without basic medical knowledge. According to the literature, about 60,000 people die each year from pressure sore comorbidities. Kasiak’s experiments have shown that the compression force is inversely proportional to the duration of the compression, with irreversible tissue changes occurring when the compression of 70 mmHg/cm2 is sustained for 1-2h. Therefore, the prevention of decubitus ulcers can be accomplished by clinically requiring a change of position every 2 hours, but decubitus ulcers occur if the position is changed every 4 hours. Once a decubitus ulcer occurs, it takes a long time to recover. To facilitate clinical management, decubitus ulcers can be divided into three phases. Phase I erythema stage. Phase II blistering phase. The third stage is the ulcer stage. The ulcer stage is further divided into a shallow ulcer stage and a deep ulcer stage. With these three stages, our clinical management becomes traceable. Stage I treatment is relatively simple. In this stage, we should actively release the pressure, local insulation and massage, use reasonable decubitus pads, and strengthen care, and generally no sequelae will remain. The second stage treatment requires special attention to keep the skin clean and dry. Small blisters should reduce friction and be allowed to absorb on their own, while large blisters can be treated by using a sterile syringe to draw out the fluid in the blisters, without cutting the epidermis, and local medication can be used to wait for their wounds to heal and peel off. It is more troublesome to change the medication in the third stage of shallow ulcers, and patients are still advised to go to the regular hospital surgical office for regular medication changes. The ways and methods of changing medication are comparable and are not described here. The deep ulcer stage should be actively treated surgically, and surgery is the most direct and effective way to deal with it, and ordinary medication changes are not suitable for this stage. At the same time, patients should actively consume a high-protein and nutritionally balanced diet to prevent anemia and hypoproteinemia, especially in the acute phase when catabolism is significant. Encourage patients to take active functional exercises and encourage exercise, which can help prevent decubitus ulcers. Take frequent baths and showers to improve blood circulation throughout the body. Prevention of decubitus ulcers should be emphasized, and prevention is the best treatment.