The pain felt when squatting or bending the knee joint has, may be caused by physiological reasons such as keeping the same position for a long time, or may be caused by pathological reasons such as meniscus injury of the knee joint, osteoarthritis of the knee joint, and so on. Commonly used treatment methods include general treatment, drug treatment, surgical treatment and so on. 1. Physiological reasons: Keeping the same position for a long time, such as standing for a long time, kneeling for a long time, etc. hinders the local blood circulation, and there may be insufficient blood supply and numbness of the nerves, and then a tingling sensation will appear when bending or squatting. This is a normal physiological reaction, appropriate stretching activities can be legs, without treatment. 2. Knee meniscus injury: the knee in the process of flexion, will lead to increased traction on the posterior horn of the meniscus, a long time may cause meniscus injury, which further aggravates the pressure burden, resulting in knee squatting pain. Pain relievers such as ibuprofen can be used appropriately to relieve the pain. When the situation is more serious, surgery is needed to repair or remove the meniscus according to the situation. 3. Osteoarthritis of the knee: When squatting, the pressure between the patella and femur will increase significantly, which may lead to wear and tear between the joint surfaces, or even peeling of the articular cartilage, causing pain in the joint. It can be treated in the early stages by using cartilage-repairing medications such as glucosamine sulfate, or in more severe cases, joint replacement surgery may be required. In addition to the above reasons, knee joint effusion, synovitis and other symptoms may occur, squatting and bending knee pain, you should consult a doctor to find out the cause of the disease, and carry out targeted treatment. The above medications should be used in accordance with medical advice.