The essence of inflammation is degeneration, exudation and proliferation inflammation, which is a defense-oriented reaction of the organism stimulated by a number of factors, and can be degenerative, including degeneration, necrosis, exudation and proliferation, with local redness, swelling, heat and pain, possibly accompanied by dysfunction, and often accompanied by varying degrees of fever, leukocytosis and enhanced metabolism throughout the body. The cause of inflammation can be bacterial, viral, or high temperature, low temperature, ultraviolet light, electric shock, strong acid, strong alkali, and also allergic reactions can lead to inflammation in the body, such as in the case of systemic lupus erythematosus, which is caused by an autoimmune reaction. Regardless of the cause and location of inflammation, the common features of inflammation are metaplasia, exudation and hyperplasia.