A dedicated device designed to be sat upon by a patient in a powered sitz bath for external hydrotherapy to relieve pain or pruritus and to accelerate the healing of inflamed or traumatized tissues of the perianal and perineal areas. The seat of the device is typically open allowing jets of water to reach the sacral, coccyx, rectum, groin and vaginal areas. The device is also typically designed with a back rest, armrests, and a frame in soft plastic [e.g., polyethylene (PE)] materials to prevent undue pressure to the skin during therapy; it may be adaptable for a person with a disability.