A history of trauma to the knee with overstrain can accelerate the degeneration and proliferation of the bones in the knee joint area, causing the patient to suffer from osteoarthritis. The patient will feel obvious pain in the knee joint, localized swelling, and in severe cases, deformation. When the patient moves the knee joint, there is pain and popping, and the range of motion of the knee joint is affected. Symptomatic treatment can be given, and injection of joint lubricant into the knee joint can reduce the clinical manifestations. In addition, excessive strain on the knee can accelerate the loss of calcium from the bones, causing the patient to develop localized osteoporosis. If the patient feels that the knee joint is often sore and weak, the patient can be instructed to carry out appropriate functional exercises for the knee joint, and oral calcium tablets and vitamin D can also reduce the clinical manifestations.