Decubitus ulcers, also known as pressure sores, are pressure ulcers caused by prolonged localized pressure on the body and poor blood flow to the pressured area. Most patients have other medical conditions that result from a lack of careful care. Decubitus ulcers occur in patients who are bedridden or wheelchair bound for long periods of time, such as those who are paralyzed, comatose, or elderly and frail. Decubitus ulcers are most likely to occur in areas of the body that are under pressure, lack protection from fatty tissue, have no muscle tissue to wrap around, or have thin muscles in the bony bulge. For example, the scapula, elbow, vertebral bulge, hip, sacrococcygeal area, inner and outer knee, inner and outer ankle, and heel of the foot. The key to preventing decubitus ulcers is to do the “five diligent” things when caring for them: turn, scrub, massage, tidy up, and change. This will prevent local pressure for too long, avoid local skin irritation, avoid local skin abrasions, and promote local blood flow. When the local skin appears red, swollen, hot, numb, etc. decubitus ulcers, the following measures can be taken if they do not subside within a short period of time: 1. Avoid friction, humidity and other stimuli, keep the skin locally dry, and use 75% alcohol wet compresses on red and swollen areas to promote the dissipation of swelling. 2. To prevent the local skin from continuing to be pressed and bruising and redness from occurring again, you should turn over every two hours. 3. Scrub the body with warm water daily to keep the skin clean. Studies have shown that malnutrition is also a major factor in the formation of bedsores, and is the main reason why bedsores remain untreated for a long time. Therefore, the prevention of bedsores should be based on the premise of ensuring the treatment of primary diseases such as diabetes and hypertension, and supplementing with sufficient, easily absorbed protein, including lean meat, fish and soy products. For patients who already suffer from bedsores, supplementation with vitamin C can promote wound healing. Proper supplementation of calcium, phosphorus and zinc can also promote the healing of chronic ulcers.