For the leg can not stand up after squatting, such patients are mostly considered to have knee joint pathology, the most common consideration is caused by the following conditions: the patient has osteoarthritis of the knee joint, especially for the joint has been deformed, swelling is very serious patients can cause. If the patient has a meniscal injury, the pain in the knee joint can be very severe with flexion and extension activities, and can also cause the patient to be unable to stand up after squatting. Patients with anterior and posterior cruciate ligament injuries, rheumatoid arthritis of the knee, gouty arthritis, and tuberculosis may also have trouble standing up after squatting. Therefore, the causes are very many, specific need to be combined with physical examination, and with the auxiliary examination clear diagnosis, active symptomatic treatment can be completely.