A blood test is also known as a blood draw. Blood tests do not always detect rheumatism, but they play a more important role in the diagnosis of rheumatic diseases. Some diseases can be detected by blood tests, but some diseases do not have specific antibodies or tests and need to be confirmed by other clinical symptoms and X-rays and other related tests. The common rheumatic diseases are systemic lupus erythematosus, ankylosing spondylitis and osteoarthritis, etc. 1. Activity, through the human leukocyte antigen B27 to determine the genetic correlation, but also need to rely on symptoms and signs and X-ray to confirm the diagnosis; 3, osteoarthritis: osteoarthritis in the elderly, blood tests are basically no abnormal performance, but also need to do X-ray and arthroscopy, etc. to diagnose; 4, other: for aortitis, temporal arteritis and rheumatic polymyalgia and other diseases, blood tests without some specific But in the active period, blood sedimentation, C-reactive protein, ferritin, etc. can be checked. For the diagnosis of these diseases, we mainly rely on clinical symptoms and angiography. Therefore, for patients suspected of rheumatism, the diagnosis relies on symptoms, signs, blood tests, as well as some imaging such as X-ray, CT, arthroscopy, etc., combined with pathology to confirm the diagnosis of rheumatism, and cannot rely on blood sampling alone to make the diagnosis. In addition, if patients are diagnosed with rheumatism, they need to avoid living in a humid and cool environment and can get more sunlight to help their bodies recover.