When walking, the cause of the bones in the joint area popping needs to be combined with the patient’s own situation, clinically there are several situations: 1, walking, knee flexion and extension with popping, if accompanied by pain and swelling, and older, consider the knee osteoarthritis; 2, walking without pain and swelling only popping, consider the joint meniscus and articular cartilage friction caused by the joint, is the performance of intra-articular This is a sign of cartilage degeneration in the joint, which is generally more common in young people; 3. In patients with a history of knee sprains, walking with popping and pain is considered to be caused by meniscal damage in the knee, but an MRI is needed to confirm the diagnosis.