Blood sedimentation refers to the rate of red blood cell sedimentation under certain conditions, joint swelling and pain at the same time blood sedimentation 26mm/h indicates that it may be rheumatoid arthritis, systemic lupus erythematosus, septic arthritis and other diseases. 1. Rheumatoid arthritis: rheumatoid arthritis can be caused by local inflammatory stimulation of the joint cavity effusion, synovial hyperplasia and soft tissue edema and arthralgias, rheumatoid arthritis activity due to inflammatory stimulation can lead to elevated sedimentation rate, appearing sedimentation rate of 26mm/h. 2. Systemic lupus erythematosus: systemic lupus erythematosus can also appear in the joints of the inflammatory reaction, mostly symmetric polyarticular swelling and pain, systemic lupus erythematosus active period also has the performance of blood sedimentation increase, appearing blood sedimentation 26mm/h test results. The arthropathy caused by SLE usually does not leave deformity. 3. Septic arthritis: often due to the infection of Staphylococcus aureus into the joints, the affected joints show redness, swelling, heat, pain and acute inflammatory reaction, which may be accompanied by generalized fever and chills. Bacteria can invade the blood circulation system, causing systemic inflammatory reaction, blood tests can be seen in the white blood cells and blood sedimentation increased. Therefore, joint swelling and pain, blood sedimentation 26mm/h should go to the hospital in time to improve the examination, and give targeted treatment after clarifying the cause of the disease.