Abstract: A shower PUVA apparatus has a reservoir within which a medicinal solution may be placed. The medicinal solution is pumped to a plurality of water jets which are positioned to uniformly coat the body with the medicinal solution. After coating the body, the medicinal solution is returned to the reservoir and recirculated throughout the apparatus. A water heater maintains the temperature of the medicinal solution at a constant temperature and a drape protects the head of the body from the spray of medicinal solution. The apparatus may be used for the treatment of psoriasis by uniformly coating the body with a psoralen solution. The treatment of psoriasis with the shower apparatus involves spraying a psoralen solution uniformly over the body of the patient for five minutes. The patient is then exposed to ultraviolet A light at an exposure determined by the skin type and a previous exposure to light.