The rheumatoid factor has some value in the diagnosis of rheumatoid arthritis, but is not specific. About 20% of normal elderly people over 55 years of age are positive for rheumatoid factor. Therefore, a positive rheumatoid factor alone cannot diagnose rheumatoid arthritis. However, if the rheumatoid factor titer is high and there is symmetrical small joint swelling, morning stiffness greater than half an hour, and the number of swollen and painful joints greater than three, rheumatoid arthritis should be considered. It is recommended that to further clarify the diagnosis, tests for CCP, AKA, APF, etc., or X-rays can be done. Regarding the treatment of rheumatoid arthritis, formal treatment should be used, and the combination of Chinese and Western medicine will be more effective.