is an uncommon condition that creates patchy, white skin that's thinner than normal. Lichen sclerosus can affect skin anywhere on your body. But it most often involves skin of the vulva, foreskin of the penis or skin around the anus.

Itching (pruritus), which can be severe Discomfort or pain Smooth white spots on your skin Blotchy, wrinkled patches Easy bruising or tearing In severe cases, bleeding, blistering or ulcerated lesions

The exact cause of lichen sclerosus isn't known. An overactive immune system or an imbalance of hormones may play a role. Previous skin damage at a particular site on your skin may increase the likelihood of lichen sclerosus at that location.

Lichen sclerosus isn't contagious and cannot be spread through sexual intercourse.

Lichen sclerosus often occurs in postmenopausal women, but also in men and children. In women, lichen sclerosus usually involves the vulva. In boys and men, uncircumcised males are most at risk, because the condition generally affects the foreskin.

In children, the signs and symptoms may improve at puberty.

Complications

Skin cancer may rarely develop in areas affected by lichen sclerosus, though lichen sclerosus doesn't cause skin cancer. Women with lichen sclerosus on the vulva are more likely to develop vulvar cancer. But consistent treatment with topical corticosteroids may reduce this slightly higher risk.

Severe lichen sclerosus can make sex extremely painful for women because itching and scarring may narrow the vaginal opening and affect the ability or desire to have sexual intercourse. In addition, blistering may create extremely sensitive skin to the point that any pressure on the area is unbearable.