Cancer of the vulva (vulval cancer) can occur on any part of your vulva. It is very rare. It most commonly develops on the inner edges of your labia majora and your labia minora. It can also sometimes affect your clitoris or Bartholin's glands (small glands on each side of the vagina). It can also occasionally start on the skin between your vulva and your anus (your perineum).
Most vulval cancers are squamous cell cancers. This means they have developed from the skin cells in the outer layer of your vulva. Around 4 in 100 cases of vulval cancers are due to a melanoma which develops from cells in your skin that cause pigmentation.