Rheumatic diseases, broadly speaking, can be divided into nine types, such as diffuse connective tissue diseases and spondyloarthropathies, as follows: 1. diffuse connective tissue diseases: mainly including overlap syndrome, systemic lupus erythematosus, vasculitis, rheumatoid arthritis; 2. spondyloarthropathies: mainly ankylosing spondylitis, reactive arthritis; 3. degenerative changes: mainly osteoarthritis; 4. metabolic and endocrine related rheumatic diseases: mainly gout and pseudogout; 5, infection-related rheumatic diseases: mainly reactive arthritis and rheumatic fever; 6, tumor-related rheumatic diseases: mainly synovial tumors; 7, neurovascular lesions: mainly neurological arthropathy and compressive neuropathy; 8, lesions of bone and cartilage: mainly osteoporosis; 9, non-articular rheumatic diseases: mainly periarticular lesions and lumbar disc lesions.