Physical examination, X-ray, CT, MRI, etc. can be done for leg bend pain. 1. Physical examination: It is mainly to check the mobility measurement of the leg, the pressure point examination and whether there is any fluid accumulation, injury and so on. 2. X-ray: X-ray examination can find out whether there is displacement and wear and tear in the joint. 3. CT: CT films can detect bone lesions and show the degree of osteophytes and degeneration. 4. MRI: It can clearly observe the destruction of the articular cartilage in the leg, and can understand the severity of degenerative diseases in the knee joint. The pain of leg bending may also be caused by lumbar spine disease and other reasons, which can also be checked out by lumbar CT as well as lumbar magnetic resonance. It is recommended that you should go to a regular hospital in time, choose the appropriate tests under the guidance of a professional doctor, and actively treat the problem.