Any new, non-healing, or pre-existing but changing skin growth can be a cause for concern. You should seek an in-office evaluation (called a "Spot check") or go to the DermatologistOnCall - www.dermatologistoncall.com and submit your case if such a concern exists. We will make every effort to offer SAME DAY/NEXT DAY evaluation either in-office with one of our providers or online for any new or changing skin lesion!