Ultraviolet phototherapy and photochemotherapy of acne vulgaris

Abstract

The therapeutic value of various UV treatments was assessed in patients with moderately severe papulopustular acne. Results did not verify the common belief that UV radiation is highly beneficial. In no instance was the comedo count appreciably reduced. Modest improvement was observed with sunburn rays (UV-B) and slightly more with the combination of long UV radiation (UV-A) and UV-B. UV-A alone had the least effect. Photosensitization with coal tar and UV-A greatly aggravated acne and was notably comedogenic. Photosensitization with methoxsalen (8-methoxypsoralen) applied topically was neither harmful nor helpful.