Vulvar lichen sclerosus, also known as lichen sclerosis, is one of two conditions, the other being epithelial hyperplasia, characterized by the appearance of white patches on the vulva. Both conditions are marked by severe itching as a common symptom, though they differ in subtle ways. For instance, in the case of lichen sclerosis, the affected skin and mucous membranes become less elastic and thinner, as seen with the shrinking of the labia minora. Women may experience a burning sensation locally and pain during intercourse. When epithelial hyperplasia occurs, the local skin and mucous membranes thicken, often showing scratch marks due to extreme itching.