Vulval cancer can also arise from lichen sclerosus or lichen planus) Invasive squamous cell carcinoma including vulval cancer and anal cancer (arising from genital warts).Anal intraepithelial neoplasia or AIN (also called anal squamous cell carcinoma in situ).Penile intraepithelial neoplasia or PIN (also called penile squamous cell carcinoma in situ, Bowen disease of the penis, erythroplasia of Quyerat).Vulval intraepithelial neoplasia or VIN (also called vulval squamous cell carcinoma in situ), which includes Bowenoid papulosis.Sebaceous adenitis (inflamed papules on labia minora).Hidradenitis suppurativa (boil-like lumps in skin folds).Non-infectious skin lesions and miscellaneous conditions that are commonly found in the genital area include: Important sexually transmitted infections (STIs) include: The groin is also a favoured site for some parasitic infestations: Genital warts, the commonest cause of papules in this region.Genital herpes, the commonest cause of recurrent blisters or sores.Bacterial vaginosis (cause of frothy discharge).Folliculitis (surface infection of hair follicles).Boils (deep infection of hair follicles).Non-venereal skin infections may present in the genital area, presumably because the organisms thrive in warmth and humidity. Non-sexually transmitted skin infections. This has been classified into provoked localised vulvodynia (or vestibulodynia) and generalised spontaneous vulvodynia ( dysaesthetic vulvodynia or neuropathic pain). When no cause has been found for vulval pain, the term vulvodynia is sometimes used.Spasm in pelvic muscles leading to vaginismus.Non-sexually acquired acute reactive genital ulceration.Non-sexually acquired acute recurrent genital ulceration (complex recurrent aphthous ulceration).Recurrent fissuring of posterior fourchette.Lichen sclerosus (white scarred patches).Psoriasis ( persistent, well-defined, red, scaly or moist patches).Irritant contact dermatitis (from wetness, incontinence, vigorous cleansing) ( incontinence-associated dermatitis).Lichen simplex (dermatitis due to localised itch-scratch-itch response and resulting in thickened skin on labia majora.Itchy vulva (pruritus vulvae) in prepubertal girls.Itchy vulva (pruritus vulvae) in adult women.Erosive lichen planus (which often also affects the mouth).The affected area is often redder than normal. Dysaesthesiaand/or burning discomfort (and less often, itching) of the penis (penodynia) and/or scrotum (scrotodynia) in the absence of a primary skin problem.Crohn disease, which may cause swelling, ulcers and granulomas.Balanitis (inflammation of the tip of the penis).Allergic contact dermatitis (most often due to fragrances, preservatives or rubber).Irritant contact dermatitis (from wetness, incontinence, vigorous cleansing) the most common cause of nonspecific balanitis (in males).Seborrhoeic dermatitis (usually affects scalp as well).Lichen simplex (dermatitis due to localised itch-scratch-itch response and resulting in thickened skin on scrotum).Balanitis( inflammation of the glans penis in males).Genital skin lesions (males and females).Sexually transmitted infections (males and females).Non-sexually transmitted skin infections affecting genital area (males and females).This page provides links to information On DermNet about skin conditions affecting the genital area. Some genital disorders are contagious, including sexually transmitted diseases. They can interfere with sexual functioning, self-image and interpersonal relationships. Genital skin problems are very common and can be very itchy or painful, distressing and embarrassing.
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