Almost everyone has a few moles. Most are harmless and simply part of what makes your skin unique. But sometimes, a new spot or a change in an existing mole can signal something more serious—like skin cancer. Knowing when to get a mole checked could make all the difference in catching problems early.

Understanding Moles

Moles, or nevi, are common growths on the skin caused by clusters of pigment-producing cells called melanocytes. They can be flat or raised, smooth or rough, and vary in color from light brown to nearly black.

Most people have 10–40 moles by adulthood, and many remain unchanged throughout life. However, some moles can evolve—or new ones can appear—which is why regular skin checks are so important.

When a Mole Is Just a Mole

Benign (noncancerous) moles typically:

• Stay the same shape, size, and color over time

• Are evenly colored and symmetrical

• Have smooth, well-defined borders

• Appear during childhood or early adulthood

Warning Signs: The ABCDEs of Melanoma

Dermatologists use the ABCDE rule to help identify suspicious moles:

• A – Asymmetry: One half of the mole doesn’t match the other.

• B – Border: Edges are irregular, ragged, or blurred.

• C – Color: Uneven shades of brown, black, red, white, or blue.

• D – Diameter: Larger than 6 mm (about the size of a pencil eraser).

• E – Evolving: Any change in size, shape, color, or new symptoms like bleeding or itching.

If a mole fits even one of these criteria, it’s worth getting it checked.

Other Red Flags

In addition to the ABCDEs, see a dermatologist if you notice:

• A new mole appearing after age 30

• A mole that feels painful, itchy, or tender

• A spot that bleeds, scabs, or doesn’t heal

• Multiple new spots developing quickly

Who’s at Higher Risk?

Certain factors increase the risk of melanoma and other skin cancers:

• Family history of melanoma

• Having fair skin, light hair, or light eyes

• A history of blistering sunburns or tanning bed use

• Having many moles (especially more than 50) or atypical moles

• Weakened immune system

If you fall into one of these categories, regular skin checks are especially important.

What to Expect at a Skin Exam

During a full-body skin exam, your dermatologist will:

• Examine all moles and skin spots under good lighting

• Use a dermatoscope (a special magnifying tool) for a closer look

• Recommend a biopsy if a mole looks suspicious

A biopsy is quick and usually done in-office. If caught early, most skin cancers are highly treatable.

Prevention & Protection

• Apply broad-spectrum SPF 30+ sunscreen daily, even on cloudy days.

• Wear protective clothing, hats, and sunglasses outdoors.

• Avoid tanning beds completely.

• Perform monthly self-skin checks at home, noting any changes.

Peace of Mind with Expert Care

Not every mole needs removal, but knowing when to get one evaluated can protect your health. When in doubt, it’s always better to get it checked.

At Pacific Crest Dermatology, Dr. Samantha Schneider and PA Sydnee Eck provide thorough skin exams and advanced treatment for suspicious moles and skin cancers. We’ll give you peace of mind—or an early diagnosis when it matters most.

📍 Pacific Crest Dermatology
1525 Vista Lane, Suite 120
Carson City, NV 89703
📞 (775) 451-3376
🕒 Monday–Thursday, 7:30am–4pm, plus the first Friday of every month

✨ Takeaway: Most moles are harmless—but changes in size, shape, or color can be warning signs of melanoma. Use the ABCDE rule, perform regular skin checks, and see a dermatologist if you have any concerns. Early detection saves lives.