The appearance of skin cancer varies widely, but most types show up as a new spot, a changing mole, or a sore that does not heal
Skin cancer often looks different from person to person. Some appear as dark, irregular patches. Others look like shiny bumps or open sores. The key is noticing something that was not there before, or a mark that is changing in size, shape, or color. Most skin cancers are slow-growing, which means you have time to see a doctor once you spot something unusual.
The three main types of skin cancer — basal cell carcinoma, squamous cell carcinoma, and melanoma — each have their own typical appearance. Basal cell and squamous cell cancers are far more common and usually less dangerous if caught early. Melanoma is rarer but more serious. Knowing what to look for helps you catch any of them sooner.
Key Takeaways
- Basal cell carcinoma often appears as a shiny, translucent bump, sometimes with a rolled edge or a small depression in the center.
- Squamous cell carcinoma typically looks like a scaly, crusty, or rough patch that may bleed or ooze.
- Melanoma can be any color and often has an irregular border, uneven coloring, or a diameter larger than a pencil eraser.
- Any spot that is new, growing, bleeding, or changing should be shown to a doctor, even if you are not sure what it is.
Basal cell carcinoma: the most common type
Basal cell carcinoma accounts for about 8 out of 10 skin cancers. It usually grows slowly and rarely spreads to other parts of the body. It most often appears on sun-exposed areas like the face, ears, neck, and hands.
Basal cell carcinoma often looks like a small, shiny bump with a waxy or translucent appearance. The bump may have a rolled or raised edge and sometimes a depression or ulcer in the center. Some people describe it as looking like a pearl. It may be skin-colored, pink, red, or slightly darker. The surface can be smooth or have tiny blood vessels visible on it. Over time, the spot may crust over, bleed, and then seem to heal — only to bleed again.
You might also see a flat, scaly patch that looks like a scar or a patch of eczema. This type is called morpheaform basal cell carcinoma and can be harder to spot because it blends in with the skin.
Squamous cell carcinoma: rough and scaly patches
Squamous cell carcinoma is the second most common type of skin cancer. Like basal cell, it usually grows slowly and is less likely to spread if caught early. It also favors sun-exposed skin.
Squamous cell carcinoma typically appears as a thick, scaly, or crusty patch. The patch may be red, pink, or skin-colored. It often feels rough or bumpy to the touch. Some people say it looks like a wart or a patch of psoriasis. The spot may bleed, ooze, or form a crust that does not go away. It can also look like a firm bump with a central depression, similar to basal cell carcinoma.
Squamous cell carcinoma can appear anywhere on the body, but it is most common on areas that get regular sun exposure. It can also develop on scars, old burns, or areas of chronic inflammation.
Melanoma: the most serious type
Melanoma is less common than basal cell or squamous cell carcinoma, but it is more likely to spread to other parts of the body if not caught early. It can develop from an existing mole or appear as a brand new spot on the skin.
Melanoma can be almost any color — brown, black, tan, red, pink, or even colorless. The key warning signs are irregular shape, uneven coloring, and a diameter larger than a pencil eraser (about 6 millimeters). The border may be jagged, notched, or blurry rather than clean and even. The surface may be bumpy or have areas that look different from one another.
Melanoma can also itch, bleed, or feel tender, though not all melanomas cause these symptoms. Some melanomas are flat and others are raised. The spot may be growing or changing in appearance over weeks or months. Any mole that is changing should be shown to a doctor.
The ABCDE rule: what to watch for
Doctors and dermatologists use the ABCDE rule to help people recognize melanoma and other concerning skin spots. This rule is a simple way to remember what to look for when you examine your skin.
Asymmetry means the two halves of the spot do not match. If you draw an imaginary line through the middle, one side looks different from the other. Border refers to the edge — a concerning spot often has an irregular, jagged, or blurry border rather than a clean line. Color means the spot has more than one shade. Melanoma often has brown, black, tan, red, and pink all in the same spot. DiameterEvolving
The ABCDE rule is most useful for melanoma, but any spot that meets one or more of these criteria should be examined by a doctor. Basal cell and squamous cell carcinomas do not always follow this pattern, so do not assume a spot is safe just because it does not fit the rule.
Where skin cancer most often appears
Skin cancer can develop anywhere on the body, but it is most common on areas that get regular sun exposure. For most people, this includes the face, ears, neck, scalp, chest, shoulders, and the backs of the hands and arms.
However, skin cancer can also appear in places that do not get much sun, such as the soles of the feet, the palms of the hands, under the nails, or in the genital area. This is especially true for melanoma in people with darker skin tones. Checking your entire body — including areas you do not see often — is important.
Some people develop multiple skin cancers over their lifetime. If you have had one, your doctor may recommend regular skin checks to catch any new spots early.
When to see a doctor about a skin spot
You do not need to wait for a spot to meet all the ABCDE criteria before seeing a doctor. Any of the following is reason enough to schedule an appointment: a new spot that was not there before, a spot that is growing or changing, a spot that bleeds or oozes, a spot that itches or hurts, or a spot that looks different from your other moles.
Your primary care doctor can examine the spot and refer you to a dermatologist (a doctor who specializes in skin) if needed. A dermatologist can often tell what a spot is just by looking at it, but if there is any doubt, they may perform a biopsy — a small procedure where a tiny sample of skin is removed and looked at under a microscope to check for cancer cells.
Finding skin cancer early makes a big difference in treatment and outcomes. Most basal cell and squamous cell carcinomas can be removed in an office visit with minimal scarring. Melanoma caught early is also much easier to treat.
Frequently Asked Questions
Does skin cancer always look dark or black?
No. Skin cancer can be any color, including pink, red, tan, brown, or even flesh-colored. Melanoma is the type most likely to be dark, but basal cell and squamous cell carcinomas are often lighter. Do not assume a spot is safe because it is not dark.
Can skin cancer itch or hurt?
Some skin cancers itch, bleed, or feel tender, but many do not cause any sensation at all. The absence of itching or pain does not mean a spot is safe. Any changing or unusual spot should be checked by a doctor.
What is the difference between a mole and skin cancer?
Most moles are harmless and stay the same throughout your life. Skin cancer spots are usually new, growing, or changing. If a mole has been there for years and looks the same, it is likely safe — but if it starts to change, have it checked.
Can I tell if a spot is skin cancer just by looking at it?
No. Only a doctor can diagnose skin cancer. Some spots that look concerning turn out to be harmless, and some that look minor are actually cancer. When in doubt, have a doctor look at it.
How quickly does skin cancer grow?
Most basal cell and squamous cell carcinomas grow slowly over months or years. Melanoma can grow faster, but even fast-growing melanoma usually gives you time to see a doctor once you notice a change. The sooner you report a changing spot, the better.