The earliest medical book in China, “Wu Xie Fang”, has records on fumigation. In the Nei Jing, there is a statement that “for those who have evil, impregnate the form with sweat”, which further elaborates the therapeutic theory of soaking and fumigation. The practical application of this method is described in the Eastern Han Dynasty. The practical application is fully reflected in the treatment of fox confusion eclipsed in the lower part of the body by fumigation with bitter ginseng soup in The Essentials of the Golden Horoscope, written by Zhang Zhongjing. The earliest use of this method for treating hemorrhoids was in Tang Dynasty. Sun Simiao’s “A Thousand Gold Essentials”. In the future, this method has been used for many generations and has been gradually developed and the scope of application has been expanded. The first time the method was used was in the Tang Dynasty. This therapy promotes the opening of the couples, the harmonization of the veins and blood flow, so as to achieve the purpose of prevention and treatment of diseases. Modern medicine believes that fumigation therapy combines medicine and heat organically through fumigation and washing to promote the absorption of drugs in the skin and affected areas, promote blood and lymph circulation, strengthen the metabolism of sugar, fat and protein and the excretion of waste in the body, facilitate the reflux and absorption of inter-tissue fluid, enhance the phagocytic ability of leukocytes, regulate neurohumoral fluids, and enhance the body’s ability to resist disease. Indications Applicable to 1.Prolapsed internal hemorrhoids, impaction . 2.Anal fistula, hemorrhoid postoperative wound bleeding, pain, edema. 3.Swollen and painful external hemorrhoids, thrombosed hemorrhoids. 4.Perianal eczema. Contraindications 1, women with menstruation and pregnancy, hypertensive patients should not use fumigation and sitz bath. 2, with acute infectious diseases, serious cardiovascular disease is prohibited. 3, internal hemorrhoids bleeding large amount, suture wound after surgery is prohibited. 4.Forbidden for those with skin allergy. V. Operation procedure 1. Preparation of goods: fumigation drugs, anal fumigation instrument. Decoction of Chinese medicine to obtain about 1000ml of juice. 2.Patient preparation: clean urine and stool. 3, first assess the patient’s age, physical condition, psychological state, condition and skin trauma at the fumigation, except for contraindications. 4.Pour the solution into the anal fumigation instrument, set the temperature of the solution between 37-40 ℃, according to the specified operation first nebulize 3 min. and then rinse 5 min a 15 min, rinse as much as possible to make the water column aligned with the wound, ultrasonic drug atomization, fumigation, ozone sterilization, micro-warm air drying. 5, sterile gauze dry. 6.Two times a day, 5-15 min each time. To 7 to 10 days as a course of treatment. More serious cases can increase the number of fumigation as appropriate. Six, precautions 1, master the temperature of the liquid and fumigation distance: in the use of fumigation method, the body surface and the distance of the liquid to be properly controlled, too close to easily burn the skin, too far away is not enough heat, can be used first far and then near or constantly moving to adjust the method of fumigation. 2, pay attention to coordination with other treatment methods: in the application of fumigation therapy, but also with massage, exercise and other treatment methods, in order to play the advantages of comprehensive treatment to improve clinical efficacy. 3, fumigation process must be adjusted according to the patient’s tolerance level of the appropriate temperature of the liquid, especially in elderly patients, due to the decline in sensitivity to temperature, to prevent the occurrence of burns when fumigation. 4.Patients with infectious diseases should use separate bathing utensils and be strictly disinfected separately. 5.After fumigation, attention should be paid to avoid wind and warmth to avoid catching a cold. 6.It is not necessary to wash with water again after fumigation to maintain the efficacy of the medicine. Seven, emergency plans 1, rash, itching and other allergic symptoms should immediately stop using, if necessary, topical application of anti-allergy ointment, oral anti-allergy drugs. 2.For patients with localized blisters or ulcers on the skin after scalding, avoid scratching, protect the trauma or apply scald ointment, universal oil, erythromycin ointment, etc.