Pediculosis pubis (crab lice) - severe perineal itching, excoriations, erythematous areas, may see little dark spots or nits adherent to pubic near roots
Syphilitic chancre - begins as small, solitary, silvery papule, erodes to red, round, or oval superficial ulcer with yellowish serous discharge, palpation - non-tender indurated base; can be lifted like button between thumb and finger
Herpes simplex virus - type 2 - episodes of local pain, dysuria, and fever, clusters of small, shallow vesicles with surrounding erythema, erupt on genital areas and inner thighs, vesicles on labia rupture in 1 to 7 days, leaving painful ulcers, initial infection lasts 7 to 10 days virus remains dormant indefinitely, recurrent infections last 3 to 10 days with milder symptoms
Red rash (contact dermatitis) - history of skin contact with allergenic substance in environment, intense pruritus, primary lesion - red, swollen vesicles, may have weeping of lesions, crusts, scales, thickening of skin, excoriations from scratching, may result from reaction to feminine hygiene spray, or synthetic underclothing
Genital human papillomavirus (HPV, conylomata acuminata, genital warts) - painless warty growths, may be unnoticed by woman, pink or flesh-colored, soft, pointed, moist, warty papules, single or multiple in cauli-flowerlike patch, occur around vulva, introitus, anus, vagina, and cervix