Lesions could be angiokeratomas, petechiae, purpura, melanosis, and nevi, for example. Seborrheic keratoses can mimic melanoma. “If it looks odd, don’t be afraid to biopsy it,” said Mauskar, assistant professor of dermatology and obstetrics and gynecology at the University of Texas Southwestern Medical Center in Dallas.

Low Threshold to Biopsy Atypical Lesions May ID Vulvar Melanoma Early, Experts Say — https://www.medscape.com/viewarticle/941157?src=rss

I first became aware of melanoma down there back in June of this year. See Vulvar Melanoma Is Increasing in Older Women

So remember, if it looks odd get it biopsied.