Connective tissue is the tissue located between specific tissues and organs, except for specific tissues such as bones, nerves, and muscles, most of which are composed of a large number of interstitial cells as well as cells that have important functional significance to the health of the human organism, with the functions of supporting, protecting the muscle, linking, and transporting nutrients. Connective tissue in a broad sense includes loose intrinsic connective tissue as well as bone and cartilage, blood and lymph, while in a narrow sense it refers to 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 hospital department for examination and then take the appropriate treatment method to avoid the seriousness of the situation.