The most common sites of osteoarthritis are the distal interphalangeal joints, proximal interphalangeal joints, the first metacarpophalangeal joint, the hip, the knee, the first metatarsophalangeal joint, and the cervical and lumbar spine. Because the knee and hip joints are weight-bearing joints, knee and hip osteoarthritis is most common in obese people. For joints that are subject to a lot of pressure and wear and tear, such as the cervical and lumbar spine, they are also susceptible to lesions. When osteoarthritis affects the terminal interphalangeal and proximal interphalangeal joints of the fingers, specific nodular changes occur, often on the dorsal or medial side of the distal or proximal interphalangeal joints, with a hard, tumor-like texture. Osteoarthritis is rare in the metacarpophalangeal joint, wrist joint, elbow, shoulder and ankle joints. Some domestic scholars believe that the incidence of symptomatic osteoarthritis is higher in the lumbar spine, cervical spine, and knee joints after investigation.