Double hip joint replacement patients discharge precautions: 1, 6 weeks, 3 months, 6 months, 6 months, one year, and then annually review X-rays; 2, 2-3 weeks after the operation to support the double crutches, point to the ground exercise, 3, 4 weeks after the operation according to their own situation to increase weight-bearing, to avoid lying on the side, and thereafter 1 week to support the single crutch weight-bearing, 8 weeks after the operation to give up the crutches to walk, 12 weeks can exercise “Wear socks”; 4. Continue to take oral antibiotics for 1 week after discharge from the hospital; 5. Avoid excessive flexion and internal rotation and other bad movements, and avoid strenuous exercise. Discharge precautions for patients with double knee replacement: 1, 3 months, half a year, one year after the operation, and then annually review X-rays; 2, functional knee exercises (flexion, extension, straight leg raising); 4-6 weeks after the operation, abandon the crutches to walk; 3, continue to take antibiotics orally for 1 week after discharge; 4, avoid excessive use of the knee joint, such as: mountain climbing, long-distance walking, running and so on. Note for single hip replacement patients: 1, 3 months, half a year, one year after the operation, and then annually review the X-ray; 2, 1-2 weeks after the operation, foot pointing to the ground, down to the ground exercise, 4 weeks later, according to their own situation to increase the weight-bearing, 8 weeks after the operation to abandon the crutches to walk, 12 weeks to work out the “wearing socks”; 3, hospitalization Continue to take oral antibiotics for 1 week after discharge; 4. Avoid excessive flexion and internal rotation and avoid strenuous exercise. Precautions for patients discharged from hospital with single knee replacement: 1. Review X-ray 3 months, half a year, one year and every year after operation; 2. Functional exercise of knee joint (flexion, extension, straight leg raising); abandon the crutches and walk 4 weeks after operation. Keep the knee in the straight position at night; 3. Continue to take oral antibiotics for 1 week after discharge from the hospital; 4. Avoid excessive use of the knee such as mountain climbing, long-distance walking, running and so on. Notes for patients discharged from hospital with single ankle joint replacement: 1, 6 weeks, 3 months, half a year, one year after the operation, and then review the X-ray every year; 2, 4-6 weeks after the operation, go down to the ground to exercise, and increase the weight according to their own situation, 6-8 weeks after the operation, abandon the crutches to walk, 6-8 weeks can exercise “Wear socks”; 3, after discharge from the hospital, continue to take oral antibiotics for 1 week; 4, avoid excessive flexion and internal rotation and other bad movements, avoid strenuous exercise.