Ulcerative colitis is an inflammatory disease of the large intestine that forms erosions and ulcers, mainly attacking the mucosa and submucosa. The cause of inflammation in the rectum is unknown, but it is thought to be related to stress and immune abnormalities. The recurrence of persistent diarrhea and blood in the stool is a disease of the large intestine, but it is generally thought to be related to immune function, which can also lead to systemic diseases. I. Symptoms Diarrhea, blood in stool, fever, frequent pulse, and anemia appear. It usually starts with diarrhea and sticky blood stools, which last for a long time. With the expansion of the lesion, abdominal pain, fever, and purulent stools gradually appear. II. Diagnosis Blood test hissing squid job seed larvae (13) dysentery CRP and other data related to inflammation are abnormal, and in severe cases, hypoproteinemia and hypoalbuminemia may occur. In addition, platelet count, fibrinogen increases, and blood is prone to clotting. III. Treatment Pharmacotherapy basically uses drugs that inhibit intestinal inflammation and suppress immune response. Since immune abnormalities are considered to be the cause of disease production, treatment centered on 5-ASA agents, the use of immunosuppressive agents, and paracorticosteroid agents may be carried out. If ulcerative colitis of the entire large intestine persists for more than 10 years, its cancer rate will be very high, and its development needs to be monitored regularly.