In general, the following changes in moles (nevi) merit consideration of at least a biopsy: changes in size, symmetry, shape, borders, or/and elevation of the mole; changes in coloration; itching, ulceration, or/and bleeding.
You should ask your physician to consider a biopsy (or/and a referrral to a Dermatologist).
Sincerely,
Robert A. Wascher, MD, FACS
www.doctorwascher.com
Author, "A Cancer Prevention Guide for the Human Race"