Irritant contact dermatitis - Anogenital in
Contact dermatitis of the vulva is more often of the irritant type, rather than allergic, due to the persistent moisture and maceration in the genital region.
Soaps, detergents, antiseptic solutions, and topical medications are often the source of irritation. Prolonged or recurrent exposure to an irritant often causes the skin to become lichenified, hyperkeratotic, and inflamed.
Early in the course of irritant contact dermatitis, patients typically present complaining of a burning or stinging; the symptoms and skin eruption usually follow the exposure by hours if the irritant is strong (whereas in allergic contact dermatitis, symptoms are usually delayed by approximately 2 days following exposure). As the irritation becomes chronic and the skin continually inflamed, pruritus can become a predominant symptom.
L24.9 – Irritant contact dermatitis, unspecified cause
110979008 – Primary irritant dermatitis
- Irritant contact dermatitis can often be misdiagnosed for allergic contact dermatitis (allergic CD) or contact urticaria. The reaction with contact urticaria will occur in minutes to hours whereas the contact dermatitis takes 24-48 hours. Allergic CD tends to have a more vigorous response than irritant CD does. Patients often have blisters, exudate, edema, and erythema with an allergic reaction. With an irritation reaction, usually only erythema, edema, and a raw, burning sensation are present.
- Lichen simplex chronicus – can develop as a complication of chronic pruritus
- Seborrheic dermatitis
- Atopic dermatitis
- Genital herpes simplex
- Lichen planus
- Bowenoid papulosis
- Bowen disease
- Extramammary Paget disease
- Tinea cruris