This is a condition of unknown cause, which mainly affects the labia in women. It results in thinned skin that's white and sensitive. Symptomatic treatment is available. For more information and pictures, check out this website:
http://www.dermnet.org.nz/
Best.
Dr. Rockoff
Nope-that's a form of eczema, commoner and easier to treat. ASR
Is this the same condition as lichen simplex?