The severity of inflammation, which is influenced by a number of factors, can be relatively mild or some serious inflammation. Inflammation refers to a variety of pathogenic factors that cause reactions such as redness, swelling, heat, and pain, collectively known as inflammation. It can be localized or systemic inflammation. Inflammation can occur in different organs and tissues, such as inflammation of the lungs, inflammation of the intestines, and inflammation of the genitourinary system. In addition, it can also be divided into infectious inflammation as well as non-infectious factors, and non-infectious inflammation mainly comes from the inflammatory response caused by some physical and chemical factors. Therefore, the occurrence of inflammation has to be assessed comprehensively from many different angles. There are some systemic inflammatory response syndromes, especially in the elderly, children or patients with underlying diseases, where inflammation can be very severe and potentially fatal. Some of the inflammation is simply some localized inflammatory changes, such as skin inflammation, which may be very mild.