After knee replacement surgery, rheumatoid synovium will slowly erode the cartilage of knee joint, and the joint will obviously narrow, and then gradually form extensive adhesion. The patient's joint function will be obviously damaged and unbearable pain will appear. Many patients will be disabled because of this problem.

The first is the ankle pump: this action is actually to bend our ankles as much as possible to form a pump-like action, which can accelerate the return of blood to the heart. Because the blood circulation of lower limbs is accelerated, the chance of thrombosis is reduced. Doing this well will help to eliminate the swelling before and after the operation. It is suggested that the number of times per day should be controlled at about 500 times. Of course, it can also be done in groups. There is no need to finish it at once. The healthy knee flexes, and the affected knee fully extends to press the bed. At this time, the quadriceps femoris contracts, the knee joint flattens, and the patella can move up and down slightly. Practice every 2 hours 1 group, 30 times in each group, each time lasting 10- 15 seconds.

Pain is a "waterloo" that most surgical patients will encounter, and it is also the most concerned issue for patients undergoing total knee replacement. In fact, frankly speaking, everyone is afraid of pain. This may also be one of the most concerned issues before and after the operation. Does it hurt after the operation? Do patients after knee replacement want to know what their life will be like after the operation? How uncomfortable will they be? How many painkillers or other drugs do they need?

Degenerative osteoarthrosis of knee joint is a common disease in the elderly. It is reported that the incidence of knee osteoarthritis in patients over 50 years old is 35%, and that in women is 74%. More and more patients with severe knee osteoarthritis need artificial knee replacement. Knee replacement can relieve knee pain, improve knee function, correct knee deformity and obtain long-term stability. Functional exercise after knee replacement is helpful to enhance the muscle strength of flexion and extension muscles of knee joint, stabilize knee joint, obtain satisfactory knee joint mobility, promote the absorption of hematoma of affected limb, prevent muscle nerve adhesion, enhance muscle strength and prevent muscle atrophy.