Sitz bath is an effective method to clean the anus, promote postoperative wound healing, and prevent infection. 1.Potassium permanganate solution sitz bath Use 1:5000~1:10000 potassium permanganate solution to sitz bath the anus to prevent infection and keep the anus clean. It is also the most common method after anal surgery. 2.Warm saline bath Use warm saline bath to sit on the anus, if the edema is heavy, the concentration can be greater than 0.9%, and the temperature should be around 40℃, generally 15～20 minutes per bath. 3.Chinese herbal decoction bath A decoction of Chinese herbal medicine to clear heat and detoxify, invigorate blood and reduce swelling is used for external washing, and after it cools to 40℃, a sitz bath is then performed. For anal itching anal eczema has a certain therapeutic effect. 4, hot spring bath For patients who have the conditions, you can choose a hot spring bath bath, especially some mineral-rich hot spring bath, has a very good anti-inflammatory, anti-swelling, antibacterial effect. Anal sitz bath note: the water temperature is generally around 40 ℃, for anal eczema, post-operative edema of the anus, you can water temperature higher first smoked, and then sitz bath after the water temperature drops. Sitz bath time is generally around 10-15 minutes.