Connective tissue is mostly composed of a large number of interstitial cells and cells that are functionally important to the health of the human organism and have the function of supporting, protecting, linking, and transporting nutrients in the body. Connective tissue is widely distributed, including loose intrinsic connective tissue as well as bone and cartilage, blood and lymph in a broad sense, and connective tissue in a narrow sense, as long as it is for intrinsic connective tissue. If there is a disease of connective tissue, there may be idiopathic myositis, rheumatoid arthritis, or lupus erythematosus, which are chronic diseases. Considering the importance of connective tissue, once you find that you are unwell, you should promptly go to the relevant departments of the hospital for examination, and then target the appropriate treatment methods to avoid serious conditions.