光化学疗法(PUVA)亦称黑光疗法,是指使用具有光敏活性作用的補骨脂素类(Psoralens)药物后加长波紫外线(UVA,即黑光)照射来治疗某些皮肤病的一种新疗法。尤其对银屑病(牛皮癣)具有治愈率高、副作用小的优点、因而受到国内外普遍重视,并已日益广泛应用于临床。1976年夏季,在美国举行的第二届国际银屑病讨论会上,PUVA是会 Photochemical therapy (PUVA), also known as black light therapy, refers to a new therapy for the treatment of certain skin diseases using prolonged ultraviolet light (UVA, ie, black light) irradiation with a psoralens drug that has a photoactive activity. Especially for psoriasis (psoriasis) has a high cure rate, the advantages of small side effects, which have been widely valued at home and abroad, and has been increasingly widely used in clinical. In the summer of 1976 PUVA was held at the 2nd International Psoriasis Symposium in the United States