1. decoction method 1. clean herbs: remove dust, gravel, etc.; 2. decoction container: preferably a casserole, but also enamel basin; 3. soak herbs: soak in cold water for about 20 minutes; 4. decoction volume: stir while adding water, fumigate herbs should add 2-3L of water at a time; 5. decoction fire: boil for 10 minutes and then decoct for 10-15 minutes on low heat; 6. decoction volume: decoction volume to account for The amount of decoction should be 2/3 of the bathing utensils, and there is no need to remove the residue. 2. Procedure 1. Prepare the items: fumigation medicine, bathing equipment, gauze 2. Pay attention to the temperature of the liquid to avoid scalding. 4. Dry with a clean towel. 5, once a day to 7-10 days as a course of treatment. Contraindications 1, menstruation and pregnancy patients should not use fumigation and sitz bath. 2. It is prohibited for those with gastrointestinal bleeding, acute infectious diseases, and severe cardiovascular diseases. 3. Internal hemorrhoids with large bleeding volume and post-operative suture wounds are prohibited.