People often ask, what is colitis? Actually, colitis is a rather broad and vague diagnosis. Depending on the location of occurrence, it can be divided into proctitis, colitis, enteritis, etc. Based on the severity of the condition, it can be categorized into acute enteritis and chronic enteritis. Depending on the cause of the disease, it can be divided into non-specific enteritis, such as ulcerative colitis, Crohn's disease, and specific types of enteritis like radiation enteritis, among others.