Top 10 Signs of Skin Cancer You Shouldn't Ignore

Skin cancer is the most common cancer in the United States. The good news? It's also one of the most treatable when caught early. The challenge is knowing what to look for, especially since many early warning signs can be easy to dismiss as a "harmless spot" or "just a mole."

Here are the top 10 signs of skin cancer that deserve a closer look.

These are the 10 signs of skin cancer to look for:

1. A Mole That Changes Over Time

Stable moles are generally nothing to worry about. But if a mole starts changing, in size, shape, or color, that's your body sending a signal worth paying attention to. Any new growth or noticeable change in an existing spot should prompt a visit to your dermatologist.

2. Asymmetry

Healthy moles are typically round and symmetrical. If you draw an imaginary line through the middle and the two halves don't match, that asymmetry is one of the classic warning signs of melanoma. This is the "A" in the well-known ABCDE rule used by dermatologists worldwide.

3. Irregular Borders

Normal moles have smooth, well-defined edges. Spots with ragged, notched, or blurred borders are worth examining. Melanoma lesions often have uneven edges that look like they're spreading or bleeding into the surrounding skin.

4. Multiple or Uneven Colors

A mole or spot with various shades of brown, black, red, white, or blue is a red flag. Most benign moles are a single, uniform shade of brown. When you start seeing multiple colors or an uneven distribution within one lesion, it warrants professional evaluation.

5. A Diameter Larger Than a Pencil Eraser

Size matters here. Any spot larger than about 6 millimeters, roughly the size of a pencil eraser, is worth getting checked. That said, melanomas can be detected at smaller sizes, which is why regular skin exams are so important rather than waiting until something "gets big enough."

6. A Sore That Won't Heal

This is one of the hallmark signs of basal cell carcinoma, the most common form of skin cancer. If you have a cut, sore, or wound that just won't heal after several weeks — or that keeps coming back, don't keep waiting it out. A persistent sore is your skin asking for attention.

7. A Pearly or Waxy Bump

Basal cell carcinoma often appears as a flesh-colored, pearl-like bump, sometimes with visible blood vessels on the surface. These lesions frequently appear on the head, neck, or hands, areas that tend to get more sun exposure. They can be easy to mistake for a harmless skin tag or cyst.

8. A Flat, Flesh-Colored or Brown Scar-Like Lesion

This can be a sign of a less common but more aggressive form of basal cell carcinoma. It tends to look like a flat scar, slightly sunken into the skin, pale, or waxy, and is easy to overlook because it doesn't always look like what most people picture when they think "skin cancer."

9. Red, Scaly Patches That Don't Go Away

Squamous cell carcinoma often starts as a rough, scaly patch of skin that may crust or bleed. It can look like eczema or a persistent rash, which is part of why it gets ignored. These patches commonly show up on the face, ears, neck, lips, and back of the hands. If a patch isn't responding to moisturizer or over-the-counter treatments, it's time to see a specialist.

10. A New or Evolving Spot That Just "Feels Different"

Trust your instincts. The "E" in the ABCDE rule stands for Evolving, any spot that is changing in any way (size, shape, color, or sensation) deserves attention. Some patients notice a spot that itches, bleeds, or just looks different from everything else on their skin. Dermatologists call this the "ugly duckling" sign. If something stands out, don't wait.

The Importance of Regular Skin Exams

You don't have to have a suspicious spot to schedule a skin check. Annual full-body skin exams are one of the best things you can do for your long-term health, especially if you have a family history of skin cancer, a history of sunburns, fair skin, or a lot of moles.

Early detection is everything with skin cancer. The 5-year survival rate for melanoma detected at its earliest stage is around 99%. That number drops significantly when it's caught later.

Self-exams are a great habit, but they're no substitute for a trained eye. Dermatologists can spot changes and patterns that are easy to miss on your own, and tools like dermoscopy allow for even closer evaluation without a biopsy in many cases.

When in Doubt, Get It Checked

If something on your skin is new, changing, or just doesn't look right, make an appointment. It's almost always nothing. But when it is something, you'll be grateful you didn't wait.

At Specialists in Dermatology, our board-certified dermatologists provide comprehensive skin cancer screenings and personalized care. Don't put off a skin check, your skin health is worth it. Healthy Skin, Healthy Life!

Call us today at (520) 382 - 3330 or click book now to make an appointment with one of our amazing practitioners. We have appointments as soon as next week.