Melanoma vs. Moles: How to Spot the Difference on Your Skin
Sep 15, 2026
Maybe you noticed a new spot on your skin. Or maybe you’re worried that an existing mole looks different than it used to. Now, you're wondering if it's just a normal mole or something more concerning like melanoma.
Understanding the difference between benign moles and melanoma can put your mind at ease and help you recognize when to schedule a professional skin exam. Our team at Advanced Laser and Skin Cancer Center in Teaneck, New Jersey, specializes in skin care, and here’s how to spot the difference on your skin.
Moles are common skin growths that most people have, and having a mole doesn’t automatically mean it’s cancerous or precancerous. Normal moles are typically round or oval, with clearly defined borders. Most are brown, tan, or black, though they can vary in shade. Normal moles usually remain the same and they don't change in size, shape, or color over time.
Moles can appear at any age and are more common in fair-skinned people and those with significant sun exposure. Having multiple moles is normal, and most people have between 10-40 moles by adulthood.
Melanoma is the most serious type of skin cancer, and it develops in the pigment-producing cells in your skin (melanocytes). While it’s less common than basal cell carcinoma (BCC) or squamous cell carcinoma (SCC), melanoma is far more dangerous because it can spread to other parts of your body if it’s not caught early.
Melanoma often develops from existing moles, though it can appear as a completely new lesion on previously clear skin. The key difference is that melanoma changes. It doesn't look the same over time the way that normal moles do.
Dermatologists use the ABCDE rule to help identify suspicious lesions versus normal moles. Learning this system helps you recognize when a mole warrants professional evaluation.
Normal moles are symmetrical. That means if you drew a line through the middle, both halves would match. Melanomas are often asymmetrical, with irregular, uneven halves.
Normal moles have smooth, well-defined borders. Melanomas typically have irregular, scalloped, or poorly defined borders that fade gradually into surrounding skin.
Normal moles are usually just one color. Melanomas often have multiple colors within the same lesion, like combinations of brown, black, tan, red, or even white or blue areas.
Moles larger than a pencil eraser (about 6 millimeters) warrant closer attention. While not all large lesions are melanoma, it’s important to get a professional evaluation.
This is one of the most important indicators when spotting the difference between normal moles and melanomas. Any change in your mole requires professional evaluation, whether it’s growing larger, changing shape, changing color, bleeding, itching, or becoming raised. Remember that melanomas change and normal moles remain stable.
Beyond the ABCDE rule, watch for lesions that bleed or ooze without injury, develop a crusty or scaly appearance, become itchy or tender, or develop a surrounding halo of discoloration.
Professional skin examinations are the most effective way to detect melanoma and other skin cancers at their earliest, most treatable stages. We typically recommend annual skin exams, where we examine your entire body systematically, including areas you might miss during self-exams like your scalp, behind your ears, between your toes, and your back.
Annual skin exams establish a baseline and allow us to track changes over time, which is critical if skin cancer does develop. Early detection of melanoma dramatically improves your survival rate. Melanoma caught at stage one has over 95% five-year survival, while advanced melanoma has far lower survival rates.
And if you notice changes during self-exams, don't wait for your annual appointment. Schedule a professional skin check immediately if you notice any lesion meeting the ABCDE criteria, any new or changing spot on your skin, any bleeding or oozing from a lesion, or any lesion that feels different than before.
Not every mole becomes skin cancer, and regular self-exams combined with annual professional skin exams are your best defense against melanoma and other skin cancers. Get your questions answered with an appointment at Advanced Laser and Skin Cancer Center. Call 201-836-9696 or book online today to get started.