Droegemueller 4 conducted an experiment study by letting postpartum women take an ice cold sitz bath every six hours during a 24-hour period after delivery. Postpartum women took a sitting in a tub of tapwater for 20-30 minutes and slowly lower the temperature by adding ice cubes floating on the surface, continued this method periodically and stopped it until the perineal pain was relieved. The mechanism of relieving perineal pain was thought to be the result of the muscle contraction and ice-sitting could decrease these stretch muscles.