Skin cancer doesn’t have one single look. It can appear as a pearly bump, a scaly patch, a dark streak under a nail, or even a pink spot that doesn’t heal. The three main types, basal cell carcinoma, squamous cell carcinoma, and melanoma, each have distinct visual features, and those features can vary depending on your skin tone. Knowing what to look for on your own body is one of the most practical things you can do, because skin cancers caught early are almost always treatable.
Basal Cell Carcinoma
Basal cell carcinoma is the most common skin cancer, and it often looks deceptively harmless. On lighter skin, it typically appears as a shiny, translucent bump with a pearly white or pink surface. You might notice tiny blood vessels running through it. These bumps can bleed, scab over, and then seem to heal before opening up again. That cycle of bleeding and scabbing without fully resolving is a hallmark sign.
Not all basal cell carcinomas look like bumps, though. Some appear as flat, scaly patches with a slightly raised edge. Others show up as brown, black, or blue lesions with dark spots and a translucent border. One form looks like a white, waxy, scar-like area with no clear edges, which makes it particularly easy to miss because it doesn’t resemble what most people picture when they think of cancer.
On brown and Black skin, basal cell carcinoma often appears as a brown, glossy black, or tan bump with a rolled border. The tiny blood vessels that are visible on lighter skin can be harder to see.
Squamous Cell Carcinoma
Squamous cell carcinoma tends to look rougher and more textured than basal cell. It commonly shows up as a flat sore with a scaly crust, a firm red bump, or a raised, wart-like growth. On the lips, it can start as a rough, scaly patch that eventually breaks open into a sore that won’t heal. These lesions often develop in areas with heavy sun exposure: the face, ears, neck, hands, and forearms.
On darker skin tones, squamous cell carcinoma can be the same color as surrounding skin, or it may appear pink, red, black, or brown. It sometimes develops as a firm bump or raised area on an old scar. Because it doesn’t always stand out visually against darker skin, changes in texture, like a new rough or scaly spot, can be just as important to notice as changes in color.
Melanoma and the ABCDE Rule
Melanoma is the least common of the three major types but the most dangerous. About 112,000 new cases are expected in the U.S. in 2026, and roughly 2.2 percent of Americans will be diagnosed with melanoma at some point in their lives. It often develops in an existing mole or appears as a new dark spot on the skin.
The ABCDE rule, developed by the National Cancer Institute, is the standard checklist for spotting melanoma early:
- Asymmetry: One half of the mole doesn’t match the other.
- Border: The edges are ragged, notched, or blurred, and pigment may spread into surrounding skin.
- Color: The mole contains multiple shades of brown, black, or tan, and may also have areas of white, gray, red, pink, or blue.
- Diameter: Most melanomas are larger than 6 millimeters (about the size of a pencil eraser), though they can be smaller.
- Evolving: The mole has changed in size, shape, or color over the past few weeks or months.
On darker skin, melanoma often appears as a dark or black bump that may look waxy or shiny. The “evolving” criterion is especially useful here: any spot that is changing deserves attention regardless of its color.
Melanoma Without Dark Color
About 5 percent of melanomas are amelanotic, meaning they lack the dark pigment most people associate with the disease. These appear as pink or red spots on the skin. Because they look like a minor irritation or a benign growth, amelanotic melanomas are frequently overlooked and tend to be diagnosed at a later stage than pigmented melanomas. If you have a pink or reddish spot that persists for several weeks, grows, or bleeds, it’s worth getting checked even though it doesn’t look “dark enough” to be cancer.
Skin Cancer Under the Nails
Melanoma can develop beneath fingernails or toenails, a form called subungual melanoma. It typically starts as a dark longitudinal band running from the base of the nail toward the tip. Early on, the band is usually less than 3 millimeters wide, but it tends to widen over time. A key warning sign is the Hutchinson sign, where the dark pigment spreads beyond the nail onto the surrounding skin of the cuticle or fingertip.
This is the most common form of melanoma in people with dark skin, and it also appears on the palms and soles of the feet. These are areas many people never think to examine, which is why checking your hands, feet, and nails should be part of any skin self-check.
Precancerous Spots to Watch
Actinic keratoses are rough, dry, scaly patches that develop from years of sun exposure. They’re typically less than an inch across and can be flat or slightly raised. Colors range from pink to red to brown, and some develop a hard, wart-like surface. The texture is often described as feeling like sandpaper when you run a finger over it.
These patches aren’t cancer yet, but a small percentage of them can progress to squamous cell carcinoma over time. They tend to appear on the face, scalp (especially in people with thinning hair), forearms, and backs of the hands. If you notice a rough patch that doesn’t resolve on its own within a few weeks, it’s worth having a dermatologist look at it.
Merkel Cell Carcinoma
Merkel cell carcinoma is rare but aggressive. It usually appears as a firm, painless, dome-shaped bump that can be skin-colored, red, or bluish-purple. It grows quickly, which is one of its most distinguishing features. Clinicians use the AEIOU criteria to characterize it: asymptomatic (it doesn’t hurt), expanding rapidly, associated with immune suppression, occurring in people older than 50, and found on UV-exposed skin in fair-skinned individuals. A fast-growing, painless bump that checks several of these boxes warrants prompt evaluation.
What Matters Most in a Self-Check
The single most useful thing to track is change. A new spot that wasn’t there a few months ago, a mole that shifts in color or size, a sore that cycles between bleeding and scabbing without healing, a rough patch that won’t go away. Any of these patterns matters more than whether a spot perfectly matches a textbook description.
Check your entire body, not just sun-exposed areas. That includes the soles of your feet, between your toes, your palms, your nail beds, your scalp, and behind your ears. Use a mirror or ask a partner to help with hard-to-see spots like your back. Taking photos of moles you want to monitor makes it far easier to notice subtle changes over time.