It is believed in Chinese medicine that this disease belongs to the category of "Intestinal Carbuncle", mostly caused by the patient's indulgence in greasy and sweat foods, intake of raw and cold foods, inadaptability to cold and warm climate, and sudden and hurried walk after meals, which lead to dysfunction of the intestinal tract, unsmooth circulation of qi and blood, disability of the intestines in transmission and transformation, failure in transformation and transportation, and further causing retention of waste products, and stagnation of qi and blood, production of dampness and heat, decayed flesh by excessive heat to form suppuration and carbuncle.