Please see www.aad.org and click on MelanomaNet.
Dr. Rockoff
What kind of changes are of concern?
I thought the scaliness and changes in the skin were to be of concern.
The kind of change you describe is not the kind associated with cancerous change, but only with irritation. Picking, for instance. I advise you to leave the spot alone and show your doctor next time you go. If needed, referral to a dermatologist may be useful, if only to get you a specific diagnosis, not because the spot is bad, because it almost certainly isn't.
Take care.
Dr. Rockoff