Sores or lesions on the male genitalia have many causes. Often, the lesions of most concern are those seen with sexually transmitted diseases (STDs). For example,genital herpes simplex, syphilis, chancroid, granuloma inguinale, and lymphogranuloma venereum are all associated with ulcers on the genitals. Other lesions in this area may be caused by venereal warts, molluscum contagiosum, allergic reactions, Behcet's disease, and non-sexually transmitted diseases. |