What skin cancer spots look like

Skin cancer spots are changes to your skin that stand out from the rest — a new mole, a patch that looks different, or a sore that won't heal. The three most common types of skin cancer each have their own appearance. Basal cell carcinoma often looks like a shiny bump or a sore with a raised edge and a hollow center. Squamous cell carcinoma usually appears as a scaly, crusty patch or a bump that bleeds easily. Melanoma, the most serious type, often looks like an irregular mole with uneven color, jagged edges, or a diameter larger than a pencil eraser.

The key is that these spots look different from your normal skin or different from other moles you have had for years. A spot that has been stable and unchanged for a long time is usually not cancer. A spot that is new, growing, changing color, or behaving differently — itching, bleeding, or oozing — is worth showing to a doctor.

Key Takeaways

  • Basal cell carcinoma often appears as a shiny, pearly bump or a sore with a rolled edge and a depression in the center.
  • Squamous cell carcinoma typically looks like a scaly, crusty, or rough patch that may bleed or ooze when scratched.
  • Melanoma frequently has irregular borders, multiple colors, and a diameter larger than a pencil eraser, and it may itch or bleed.
  • Any mole or spot that is new, growing, changing shape or color, or causing symptoms like itching or bleeding should be examined by a doctor.
  • The ABCDE rule — Asymmetry, Border irregularity, Color variation, Diameter over a quarter-inch, and Evolving (changing) — helps you identify spots that need medical attention.

The ABCDE rule for spotting melanoma

Doctors use a simple memory tool called the ABCDE rule to help people recognize melanoma, the most dangerous form of skin cancer. Each letter stands for a warning sign to watch for on any mole or spot on your skin.

Asymmetry means the mole is not evenly shaped — if you drew a line down the middle, the two halves would not match. Border refers to the edge: melanoma often has a jagged, notched, or blurry border instead of a clean, even line. Color variation means the spot contains more than one shade — brown, black, tan, red, or even white or blue in the same mole. Diameter is the width: a spot larger than a pencil eraser (about 6 millimeters) is more likely to be melanoma. Evolving means the mole is changing — growing, darkening, itching, or bleeding.

If a spot on your skin matches one or more of these signs, that does not mean you have cancer, but it does mean a doctor should look at it. Many benign (non-cancerous) moles can have one or two of these features. The combination of several features, or a spot that is actively changing, is what raises concern.

Basal cell carcinoma: the most common type

Basal cell carcinoma is the most frequently diagnosed skin cancer, and it usually grows slowly on areas exposed to the sun — the face, ears, scalp, neck, and hands. It often looks like a small, shiny bump with a waxy or pearly appearance, sometimes with tiny blood vessels visible on the surface. The center may be depressed or have a hollow appearance, and the edges are often raised and rolled.

Some basal cell carcinomas look like a sore that bleeds, crusts over, and then seems to heal, only to bleed again weeks or months later. Others appear as a flat, scaly patch that is slightly raised and may be pink, red, or brown. Because basal cell carcinoma grows slowly and rarely spreads to other parts of the body, it is the least dangerous form of skin cancer, but it still needs treatment to prevent it from growing deeper into the skin.

Squamous cell carcinoma: scaly and crusty

Squamous cell carcinoma also appears on sun-exposed skin, often on the face, ears, lips, and hands. It typically looks like a rough, scaly, or crusty bump or patch that may be pink, red, or tan. The surface is often thick and may feel tender or sore to the touch. Some squamous cell carcinomas bleed easily or ooze when you scratch or bump them.

Unlike basal cell carcinoma, squamous cell carcinoma can spread to lymph nodes or other parts of the body if left untreated, especially if it grows for a long time without being removed. This is why any persistent scaly patch or bump that does not heal within a few weeks deserves a doctor's attention. Squamous cell carcinoma is more likely to develop in people with a weakened immune system or a history of sun damage to the skin.

Melanoma: the most serious type

Melanoma can appear anywhere on the body, not just on sun-exposed skin, and it can develop from an existing mole or appear as a completely new spot. It often has an irregular, asymmetrical shape and contains multiple colors — shades of brown, black, tan, red, or even blue or white. The border is usually uneven or blurry rather than sharply defined. Many melanomas are larger than a pencil eraser when they are first noticed.

Melanoma can also itch, bleed, or feel tender, and it may change in appearance over weeks or months. Some melanomas are flat and others are raised. The key difference between melanoma and a benign mole is that melanoma is actively changing or has features that look distinctly abnormal. Because melanoma can spread quickly to other organs, early detection and removal are critical. Any spot that concerns you or matches several features of the ABCDE rule should be examined by a dermatologist — a doctor who specializes in skin conditions.

Where skin cancer spots most often appear

Skin cancer develops most often on areas of your body that receive the most sun exposure over your lifetime. For most people, this includes the face, ears, scalp (especially if you have thinning hair), neck, shoulders, chest, and the backs of the hands and arms. These areas are exposed to ultraviolet (UV) radiation from the sun year-round, even on cloudy days.

However, melanoma can appear anywhere on the body, including areas that are rarely or never exposed to the sun — the soles of the feet, the palms of the hands, under the fingernails, or between the toes. This is why it is important to check your entire body regularly, not just the areas you think are at highest risk. If you have a partner or family member, ask them to check the back of your neck, scalp, and back — areas you cannot see easily in a mirror.

When to see a doctor about a skin spot

You should see a doctor if you notice a new mole or spot, or if an existing mole or spot has changed in any way over the past few weeks or months. Changes include growth in size, darkening or lightening in color, development of new colors within the spot, changes in shape or border, itching, bleeding, oozing, or tenderness. You do not need to wait for multiple changes — even one change is worth having checked.

Your primary care doctor can examine the spot and refer you to a dermatologist if needed. A dermatologist has specialized training in skin conditions and can often tell whether a spot is cancerous by looking at it, and can remove it for testing if there is any doubt. The earlier skin cancer is found and treated, the better the outcome, especially for melanoma. If you have a family history of skin cancer, a history of severe sunburns, or fair skin that burns easily, talk to your doctor about how often you should have your skin checked.

Frequently Asked Questions

Can skin cancer itch or hurt?

Yes. Melanoma often itches, bleeds, or feels tender. Basal cell and squamous cell carcinomas may also itch or bleed, especially if you scratch them. Any mole or spot that is itching, bleeding, or painful should be shown to a doctor, even if it does not look unusual.

Do all new moles turn into cancer?

No. Most new moles are benign and will never become cancer. However, a new mole that appears after age 30, or any mole that is changing in size, shape, or color, should be examined by a doctor to rule out cancer.

What is the difference between a mole and a freckle?

Freckles are flat, small, and usually light brown. They are caused by sun exposure and do not change much over time. Moles are usually raised, darker, and more defined. A freckle that is growing, darkening, or becoming raised should be checked by a doctor.

Can I check my own skin at home?

Yes. Once a month, stand in front of a mirror in good light and look at your entire body, including your scalp, the soles of your feet, and between your toes. Use the ABCDE rule to identify any spots that concern you. Take photos of new or changing spots so you can show them to your doctor and track changes over time.

Is every brown spot on my skin cancer?

No. Most brown spots, age spots, and freckles are harmless. The spots to watch for are those that are new, growing, changing color or shape, or causing symptoms like itching or bleeding. When in doubt, have a doctor look at it.