Genital psoriasis can sometimes be manifested as well-demarcated, red, shiny rashes on the genitals in women. Most common is the so-called inverse psoriasis under the breasts, in groins, and armpits.
The rash generally itches and stings. In the genital area, they are usually symmetrically spread over the skin of the labia and sometimes around the anus. Genital psoriasis can be triggered by yeast infections, and those with a genetic predisposition are more susceptible to psoriasis. Psoriasis usually manifests around age 20.
Topicals and UV light are the most common treatments for genital psoriasis. Vaginal infection due to psoriasis is a fairly common problem that can be treated with potent cortisone creams.