A pressure sore is a limited injury to the skin or subcutaneous tissues that occurs at the bony process due to pressure or a combination of shear or frictional forces. Pressure sores are most common in the sacrococcygeal region and the heel of the foot. Pressure sores increase the patient’s pain and financial burden, and the occurrence of pressure sores in hospitalized patients can also delay recovery and increase the number of days spent in the hospital. How should pressure sores be prevented in patients who are bedridden for long periods of time? (a) Correct positioning. As long as physical conditions allow, different positions should be placed according to the following points: 1. Supine position Positioning points: place pillows under the head and under the lower legs; place hands flat on the sides of the body or abdomen to avoid pressure; do not place pillows under the heels to avoid pressure on the heels; place small pillows under the waist. 2.Raise the head of the bed 30 ° lying position Positioning points: raise the head of the bed no more than 30 °; raise or pillow under the buttocks, the bottom of the foot to be blocked to prevent slippage to reduce the shear force; pillow placed under the calf, do not place under the heel, to avoid pressure on the heel. 3.Lateral position Positioning points: try to choose 30° lateral position; place the pillow on the patient’s head and neck; place another pillow against the arm, place the shoulder inward; place another pillow to support the thigh and calf, place the femur inward. 4. Prone position: place a suitable pillow under the head; face to the sides; place a small pillow on the abdomen to avoid hyperextension of the vertebrae; place a pillow under the calf to elevate the calf. (B) Position change 1. Encourage independent activities. 2. When assisting in position change, lift the patient’s body to minimize friction and shear, and avoid dragging, pulling and tugging. If the skin redness does not subside within 15 minutes, the turning time should be shortened; massage is contraindicated for those whose pressure redness does not subside. (iii) Selecting the appropriate support surface 1. Patients at high risk must use a higher level of support surface. 2.The use of support surfaces still requires regular position changes. 3, do not use small bubble (diameter <250px) alternating decompression air mattress or decompression pad. 4.Avoid the use of ring or loop type devices, water-filled gloves and synthetic sheepskin pads. (D) Skin care 1, regularly check the skin condition of the whole body, especially the skin of the bony prominence under pressure. 2.Keep the skin clean and keep it moderately moist. 3.Prohibit forceful massage on the pressure area. (E) Application of dressings to prevent pressure sores 1. Dressings can be used to prevent pressure sores in high-risk patients. 2.Commonly used dressings for pressure ulcer prevention: hydrocolloid dressing, liquid dressing, foam dressing, etc. (6) Strengthening nutritional support