There are many types of arthritis, such as osteoarthritis, infectious arthritis and gouty arthritis. The causes of different kinds of arthritis are different, which may be related to infection, heredity, high uric acid and so on. 1. Osteoarthritis: also known as degenerative joint disease and osteoarthropathy, related to heredity, obesity, trauma, age and so on. It leads to the wear and tear of joint cartilage, and most elderly patients can be accompanied by osteophytes, which makes them susceptible to osteoarthritis. 2. Infectious arthritis: Inflammatory bacteria, viruses or fungi invade the joints and cause joint inflammation. Common infectious arthritis includes tuberculous arthritis and viral arthritis. 3. Gouty arthritis: Hyperuricemia as the important biochemical basis. When the level of uric acid in the body is too high and cannot be discharged in time, uric acid accumulates in the joints and forms crystals, leading to gouty arthritis. Arthritis can also be seen in rheumatism and other causes, it is recommended to consult a doctor in time, follow the doctor’s instructions for further examination, with the help of the doctor to clarify the cause, and targeted treatment or therapy.