Symptoms
Genital psoriasis
Affected Sites
- Pubic Region: Psoriasis here can be treated similarly to scalp psoriasis but requires gentler handling due to the sensitivity of the skin.
- Upper Thighs: Appears as small, red, scaly patches. Friction between thighs can exacerbate irritation, which can be alleviated with emollients.
- Skin Folds Between Thigh and Groin: Typically non-scaly, reddish-white, and may crack. Misdiagnosis with thrush is possible.
- Vulva (Women): Often smooth, red, and non-scaly. Emollients can reduce irritation.
- Penis (Men): Small red patches on the glans or shaft, often shiny without scaling. Both circumcised and uncircumcised men can be affected.
- Anus: Red, non-scaly, itchy, weepy, and sore. Secondary bacterial and fungal infections are common.
- Buttocks: Can be red and non-scaly or heavily scaled.
Clinical Features
Psoriasis affects around 2% of the population and is common in the anogenital area. It can present as well-demarcated, bright red plaques that are typically non-scaly due to friction. In women, it appears symmetrically on the vulva and may extend to the labia majora. In men, it commonly affects the glans and the corona of the penis, with scaling more common in circumcised men. Psoriatic napkin eruption is common in children under two years and usually resolves within a year.
