There are many types of bone and joint diseases, and the common ones are non-septic arthritis, septic infection of joints, joint tuberculosis, osteonecrosis, bone tumors, joint deformity, metabolic bone diseases, etc. 1. Non-septic arthritis: refers to chronic, inflammatory arthritis other than infectious arthritis, such as rheumatoid arthritis, ankylosing spondylitis and so on. 2. Septic infection of bone and joint: it refers to bone and joint diseases caused by bacteria and virus invading the joints, such as acute septic osteomyelitis. 3. Osteoarticular tuberculosis: it refers to the suppurative and destructive disease of bone and joint caused by tuberculosis mycobacterium infection. 4. Osteonecrosis: pathological changes caused by poor blood transport of bone, which leads to necrosis of bone cells and bone marrow and subsequent repair, such as ischemic necrosis of femoral head. 5. Bone tumor: it refers to the tumors occurring in bone and the accessory tissues of bone such as blood vessels and nerves, such as osteosarcoma. 6. Joint deformity: it refers to the disease caused by congenital or acquired dysplasia of bone and joint, such as pediatric clubfoot. 7. Metabolic bone disease: it refers to the disease caused by the metabolic disorder of bone mineral and bone matrix, such as osteoporosis. There are many types of joint diseases, including osteoarthritis, fluorosis, etc. When joint discomfort occurs and the symptoms continue to be unrelieved, it is recommended to consult a doctor in time and follow the doctor’s instructions for treatment after a clear diagnosis.