A patient sits in a sitz bath with the water covering the buttocks and hips, states MedlinePlus. The bathtub should contain 2 to 3 inches of warm water.
A sitz bath is a home treatment that helps to relieve pain around the private parts and the bottom, explains WebMD. Doctors recommend a sitz bath for patients with an anal fissure, hemorrhoids, constipation, vaginal infections or women who have just had a baby. It works by soaking in the water three times a day for 10 to 15 minutes. The water should not contain bubble bath, shower gel or any type of soap.