What Melanoma Looks Like (and Does It Itch?)

A friend of mine found hers while drying off after a swim. Not a dramatic discovery, just a glance in the mirror at a small dark spot on the back of her calf that she was fairly sure had not been there last summer. It did not hurt. It did not itch. It simply looked, in her words, “like it did not belong to the family.”

That instinct turns out to be one of the most useful things a person can bring to skin health. Melanoma rarely announces itself with pain or fever or anything that feels like illness. It arrives quietly, as a shape or a color that is a little off, and the people who notice it early are usually the ones who know their own skin well enough to spot a stranger.

This article walks through what melanoma actually looks like, where it hides, what the evidence says about itching, and the specific changes that should prompt a call to a clinician rather than another month of watching.

Why melanoma so often starts as "just a mole that changed"

Melanoma begins in melanocytes, the pigment-producing cells scattered through the deepest layer of the epidermis. Those same cells cluster together to form ordinary moles, which is why a melanoma can look, at first, like a mole with slightly worse manners. Mayo Clinic notes that the first sign is frequently either a change in an existing mole or the appearance of a new pigmented or unusual-looking growth on the skin.

The distinction that matters is behavior over time. Ordinary moles tend to settle into a stable size, color and shape by early adulthood and then stay put for decades. A melanoma keeps doing things: widening, darkening, sprouting a second color, developing a raised area within a flat patch. Ultraviolet damage to melanocyte DNA drives much of this, which is why melanomas most often appear on skin that has seen the sun: the back, the legs, the arms and the face, according to Mayo Clinic. Yet melanoma can also develop on skin that rarely sees daylight, including the soles of the feet and beneath the nails.

This is where I will state a clear opinion, because the evidence supports it: the single most valuable habit is not memorizing every feature of melanoma but knowing what your own skin normally looks like. A spot that differs from all the others on your body, the so-called “ugly duckling,” deserves attention even if it fails to tick every textbook box. The checklists that follow are tools for describing that difference, not substitutes for noticing it.

The ABCDE rule for melanoma, explained letter by letter

Dermatologists teach a five-letter mnemonic because it turns a vague feeling of “that looks odd” into words you can use on the phone with a clinic. The CDC and Mayo Clinic both describe it in similar terms.

• A for asymmetry. Imagine folding the spot in half. A normal mole matches itself reasonably well. A melanoma often does not; one half is larger, darker or shaped differently from the other.
• B for border. Healthy moles tend to have a smooth, defined rim. Melanoma edges are more likely to be notched, scalloped or blurred, fading into the surrounding skin without a clear line.
• C for color. A single even shade is reassuring. Several shades in one spot are not. Look for mixes of brown and black, or patches of tan, pink, red, white or blue within the same lesion.
• D for diameter. Mayo Clinic gives the reference point of about 6 millimeters, roughly a quarter inch or the width of a standard pencil eraser. Larger spots warrant a closer look, though melanomas can be found when smaller.
• E for evolving. Any change in size, shape, color or elevation, or a new symptom such as itching, crusting or bleeding, counts.

Of the five, evolution is the letter I would underline twice. A mole that has looked identical for fifteen years and satisfies two of the other criteria is far less concerning than a spot that was not there in the spring and has visibly grown by autumn. The ABCDE rule is a description of a snapshot; change is the film.

What color is melanoma, and can it be pink or skin-colored?

Most people picture melanoma as very dark, and the classic version is exactly that: a brown-black patch with uneven pigment, sometimes so dark it looks almost blue. Melanocytes make melanin, so it follows that a tumor of melanocytes is usually pigmented. Mayo Clinic describes the typical range as brown, black, tan and combinations of white, gray, red, pink or blue.

The exception is the one that catches people out. Amelanotic melanoma produces little or no pigment and appears as a pink, red, reddish-brown or flesh-toned bump or patch. Cleveland Clinic points out that these lesions are frequently mistaken for a pimple, an insect bite, a wart or a small scar because nothing about their color signals danger. Without the visual cue of darkness, the other clues carry the weight: a spot that persists for weeks when a pimple would have healed, that grows steadily, or that feels firm under the fingertip.

Color also behaves differently over time. A melanoma may darken in one region while another area loses pigment, leaving a pale or white zone where the immune system has attacked and cleared some tumor cells. A mole that develops a halo of pale skin, or a spot that seems to be “fading” in patches while spreading at the edges, is showing exactly the kind of instability that warrants a professional look.

The practical lesson is simple to say and hard to remember in the moment: not dark does not mean not melanoma. Judge a spot on whether it is changing and whether it matches its neighbors, not on how alarming its shade appears.

Does melanoma itch? What the evidence actually shows

Yes, sometimes. Both the NHS and Mayo Clinic list itching among the possible symptoms of melanoma, alongside tenderness and bleeding. The mechanism is thought to involve inflammation and nerve irritation as abnormal cells expand within the skin and release signaling molecules that activate nearby sensory fibers. Itch can also accompany the early immune response to a tumor.

Here is the part that matters more: itching is neither reliable nor specific. Many melanomas, including some that are already growing deeper, produce no sensation whatsoever. My friend’s did not. Meanwhile, an enormous number of itchy skin spots are entirely benign: eczema, insect bites, dry skin, seborrheic keratoses, healing scratches. Non-melanoma skin cancers, particularly the more common basal and squamous cell types, are also frequently itchy or sore. An itch, on its own, tells you very little about what is causing it.

The evidence supports treating itch as a tiebreaker rather than a headline. A mole that has begun to itch and has also changed in size or color is more concerning than a mole that merely itches. A spot that itches, then bleeds slightly when scratched, then fails to heal over two or three weeks, has crossed into territory that a clinician should assess.

What the evidence does not support is reassurance drawn from the absence of itch. “It does not bother me” is a common reason people delay a skin check, and it is exactly the wrong reason. Melanoma is, above all, something you see. If you are relying on how a spot feels, you are using the least dependable sense available to you.

Does melanoma hurt, bleed, crust or feel raised?

Pain is uncommon in early melanoma. The lesion sits within the upper layers of skin where the tumor cells, at first, cause little mechanical pressure and limited inflammation. Tenderness or soreness tends to appear later, if it appears at all, once the growth is thicker or the surface breaks down. Mayo Clinic includes pain and tenderness among the signs of an advancing lesion rather than an initial one.

Bleeding and crusting are more informative. A spot that oozes, weeps, forms a scab and then loses it without ever fully healing is behaving abnormally. Healthy skin repairs a scratch within days; a surface that keeps breaking open over several weeks suggests fragile, disorganized tissue underneath. Some people first notice a melanoma because it left a mark on a towel or a pillowcase, or because it bled after minor contact with a shirt collar or bra strap.

Texture changes are worth a moment of attention. Early melanomas are often flat or barely raised. As they grow, a previously flat area may develop a bump within it, and the surface may turn shiny, scaly or slightly ulcerated. Run a clean fingertip over a suspicious mole: a new firmness or a raised nodule inside a flat patch is a change, even when the color looks the same.

None of these features is required for a diagnosis, and none confirms one. They are the ways a growing tumor announces that it is disrupting normal skin architecture. The absence of pain, bleeding and crusting is common in melanoma and should never be read as an all-clear.

Nodular melanoma: the type that breaks the ABCDE rules

Most of what you have read so far describes superficial spreading melanoma, the most common form, which grows outward across the skin before it grows down. Nodular melanoma behaves differently, and it is the reason clinicians dislike relying on any single checklist.

The NHS describes nodular melanoma as a type that can grow more quickly than other forms and that may appear as a raised, firm lump on the skin, sometimes on areas not previously affected by moles. It is often symmetrical, often uniform in color, and frequently small when first noticed. In other words, it can pass the A, B, C and D of the ABCDE rule while still being a dangerous tumor.

Because of this, dermatologists sometimes use a second mnemonic, EFG, for lesions that feel more like a lump than a patch:

• Elevated: a bump that rises above the surrounding skin rather than lying flat within it.
• Firm: it resists gentle pressure instead of feeling soft like a skin tag or fatty lump.
• Growing: it has been enlarging steadily for more than a few weeks.

Nodular melanomas are more often red, pink or skin-colored than the flat type, which makes them easy to dismiss as a blood blister, a pimple that will not resolve, or a small cyst. They can bleed readily because of their fragile surface and rich blood supply.

The takeaway is about speed. Flat melanomas often provide months of visible warning. A firm, growing bump provides less, and the appropriate response to a new lump that keeps enlarging over several weeks is a clinical assessment, not a longer period of observation.

Where melanoma hides: nails, palms, soles, scalp and eyes

Melanoma is usually a disease of sun-exposed skin, but not always, and the exceptions are the cases that get missed longest. Mayo Clinic groups several of these under the heading of “hidden melanomas,” tumors that develop where people rarely look and clinicians may not routinely examine.

Under a nail. Subungual melanoma typically starts as a brown or black streak running lengthwise along a fingernail or toenail, most often the thumb or big toe. A single dark band that widens over months, darkens unevenly, or spreads pigment onto the surrounding cuticle or skin fold is the pattern to watch. A bruise from a stubbed toe, by contrast, moves outward as the nail grows and eventually clears.

Palms and soles. Acral lentiginous melanoma appears on the palms, the soles or between the toes, often as a flat, irregular dark patch. Mayo Clinic notes this form is more common in people with darker skin, where it accounts for a larger share of melanoma diagnoses.

Scalp and behind the ears. Hair hides these areas from view, and melanomas here may be discovered late, sometimes by a hairdresser or partner.

Inside the body. Mucosal melanoma can arise in the lining of the mouth, nose, digestive tract, urinary tract or genitals. Ocular melanoma develops in the eye, usually the uvea, and may cause no symptoms until vision changes appear.

The practical point is coverage. A skin check that stops at the collar and the hem is incomplete. Nails, the spaces between toes, the soles, the scalp and the skin behind the ears all belong in the survey.

What melanoma looks like on Black and brown skin

Much of the public imagery of melanoma features very fair skin, and that skews how people with darker skin assess their own risk. Melanoma is less common in people with more melanin, because pigment absorbs a portion of ultraviolet energy before it reaches melanocyte DNA. Less common is not never, and the pattern of disease shifts in ways that are worth knowing.

On darker skin, melanoma is more likely to appear on sites that receive little sun: the palms, the soles, under the nails and on mucous membranes. Mayo Clinic specifically notes the higher proportion of acral melanoma among people with darker skin. Because these locations are not where most people expect skin cancer, and because a dark patch on already-pigmented skin attracts less attention, diagnosis is frequently delayed.

What to look for changes only slightly. The ABCDE features still apply. A new dark patch on the sole of the foot, a widening dark band under a toenail, a spot on the palm with an irregular outline, or a mole anywhere that has become noticeably darker or more varied in color should be assessed. Amelanotic melanoma, the pink or flesh-colored kind, can also occur and may appear as a shiny bump that does not match surrounding skin tone.

Sun protection still matters for everyone, but for people with darker skin the more important habit may be the deliberate inspection of feet, hands and nails, places a sunscreen-focused message tends to overlook. A dark line under a nail that has not grown out after two or three months is a reasonable reason to book a visit, whatever your skin tone.

Melanoma vs a normal mole vs common look-alikes

Most spots that worry people turn out to be something ordinary, and several harmless growths share features with melanoma. Knowing the neighbors helps you describe the stranger. The table below summarizes typical patterns; it is a guide to observation, not a substitute for examination, and any spot that is changing should be checked regardless of which column it seems to fit.

Feature	Ordinary mole	Seborrheic keratosis	Melanoma (typical)
Symmetry	Usually round or oval	Often oval, may be irregular	Frequently asymmetrical
Border	Smooth, defined	Sharply defined, looks “stuck on”	Notched, blurred or ragged
Color	One even shade of tan or brown	Tan to dark brown, waxy or warty surface	Multiple shades; may include pink, white or blue
Size	Usually under 6 mm	Variable, often larger	Often over 6 mm but can be smaller
Change over time	Stable for years	Slow, may multiply with age	Evolving over weeks to months
Sensation	None	Sometimes itchy, may catch on clothing	None, or itch, tenderness, bleeding

Two other frequent impostors deserve a mention. A blood blister or traumatic bruise under a nail is dark and alarming but grows out with the nail over weeks. A dermatofibroma is a small, firm brown bump, usually on the legs, that dimples inward when pinched from the sides. Neither behaves like a melanoma over time, and time is the column that resolves most of the ambiguity in this table.

Who is more likely to develop melanoma

Risk is not destiny, but it should shape how carefully you look. Mayo Clinic and the CDC describe a consistent set of factors.

Ultraviolet exposure leads the list. Both natural sunlight and tanning beds deliver UV radiation that damages melanocyte DNA, and Mayo Clinic notes that a history of one or more severe, blistering sunburns, especially in childhood or adolescence, raises lifetime risk. Living closer to the equator or at high altitude increases cumulative dose. Tanning bed use, particularly before age 30, is independently associated with higher melanoma risk according to the CDC.

Skin type matters through the same mechanism. People with fair skin that freckles or burns easily, light-colored eyes and red or blond hair have less protective melanin and a higher risk. This does not exempt anyone else; it simply changes the odds.

Mole count is a useful and often overlooked signal. Mayo Clinic identifies having more than 50 ordinary moles as a risk factor, along with having atypical moles, sometimes called dysplastic nevi, which are larger and more irregular than average.

Family and personal history round out the picture. A first-degree relative with melanoma, or a previous melanoma of your own, elevates risk substantially. A weakened immune system, whether from a medical condition or from medications that suppress immunity, also reduces the body’s ability to clear abnormal cells early.

If several of these apply to you, the evidence-based response is not anxiety but structure: regular self-examination, a clinician who knows your skin, and a lower threshold for asking about a spot that has changed.

How to check your own skin for melanoma at home

A skin self-examination takes about ten minutes, requires a full-length mirror, a hand mirror and good light, and works best when done the same way each time. The goal is not to diagnose anything. The goal is to build a mental map of your skin so that a newcomer stands out.

Start in the mirror with your face, ears, neck and chest. Lift your arms and look at the sides of your torso, then the undersides of the arms, the palms, and between the fingers. Sit down and examine the front of the thighs, shins, tops of the feet, between the toes and the soles. Use the hand mirror for the back of the neck, the back, the buttocks and the backs of the legs, or ask someone you trust to look. Part your hair in sections to see the scalp, and check the skin around and under the nails.

Photographs help enormously. A phone picture of your back, taken with the same lighting and distance every few months, gives you an objective record to compare against, which is far more reliable than memory. Note the date. If a mole seems different, the image settles the question of whether you are imagining it.

People with many moles sometimes benefit from a baseline full-body photographic record made in a clinical setting, which a dermatologist can compare against at future visits. Mayo Clinic and the NHS both recommend regular self-checks and prompt professional assessment of any spot that is new or changing, rather than waiting for symptoms.

Consistency beats intensity here. A calm monthly look that you actually do is worth more than an anxious hour once a year.

When to see a doctor about a mole or skin spot

The NHS advice is direct: see a clinician if you have a mole that has changed in size, shape or color, or one that is itching, bleeding, crusting or painful, or a new growth that does not match your other spots. That threshold is deliberately low, because the cost of assessing a benign mole is small and the cost of missing a melanoma is not.

Treat the following as red flags that call for an appointment within the next few weeks rather than a longer wait-and-see period:

• A mole or spot that has visibly grown, changed shape or gained a new color over weeks to months.
• Any skin lesion that bleeds, oozes or scabs repeatedly and has not healed within three to four weeks.
• A new firm lump anywhere on the skin that is steadily enlarging.
• A dark band under a fingernail or toenail that is widening, darkening or spreading onto the surrounding skin, particularly without a remembered injury.
• A spot on the palm, sole or between the toes that is new, irregular or changing.
• An “ugly duckling”: one mole that looks clearly different from every other mole on your body.

Seek care more urgently if a suspicious spot is accompanied by a new lump in the nearby lymph node area, such as the armpit, groin or neck, or if a previously diagnosed melanoma site shows new pigment, a lump or a sore.

You do not need to be certain before you call. The most common outcome of a mole check is reassurance, and clinicians would far rather examine ten harmless spots than see one melanoma arrive later than it should have.

What happens at the appointment: dermoscopy, biopsy and staging

A skin check is quick and painless. The clinician will look at the spot in question and usually at the rest of your skin, since people who have one suspicious lesion may have others. Many use a dermatoscope, a handheld magnifier with polarized light that reveals pigment patterns, blood vessels and structures beneath the surface that the naked eye cannot resolve. Mayo Clinic describes this as a routine part of evaluating pigmented lesions.

If the spot looks concerning, the only way to confirm melanoma is a biopsy. Under local anesthetic, the clinician removes either the entire lesion with a small margin of normal skin or, for large lesions in difficult locations, a representative sample. The tissue goes to a pathologist, who examines it under a microscope and, when melanoma is present, measures how deeply the tumor has grown into the skin, whether its surface has ulcerated, and how rapidly its cells appear to be dividing.

Those measurements drive staging. Thin melanomas confined to the upper skin layers are staged differently from thicker tumors, and the treating team may recommend imaging or an assessment of nearby lymph nodes for deeper lesions. The NHS outlines this pathway in plain terms: examination, biopsy, pathology, and then a discussion of stage and options.

Patients commonly ask two things. First, how long results take: pathology usually returns within one to two weeks, though complex cases take longer. Second, whether the biopsy itself is risky: it leaves a small scar and carries the ordinary minor risks of any small skin procedure, and it does not cause a melanoma to spread. The decision about which biopsy technique and what follows sits with the clinician who examines you.

How melanoma is treated, in plain language

Surgery is the foundation. For most melanomas, treatment begins with a wide local excision: the clinician removes the biopsy site along with a margin of surrounding normal-appearing skin, with the margin width guided by the tumor’s measured thickness. For thin, early lesions this is frequently the only treatment required, according to both Mayo Clinic and the NHS. The wound is closed directly or, for larger areas, with a skin graft or flap.

When a melanoma is thicker or has spread to lymph nodes, additional approaches enter the conversation. The two main categories work in very different ways. Immunotherapy uses medicines that release the brakes on the body’s own immune cells, allowing them to recognize and attack melanoma cells that had been evading detection. Targeted therapy uses medicines designed to block specific molecular signals that some melanomas rely on to grow; tumor testing determines whether a particular melanoma carries the relevant mutation. Radiation therapy and, less often, chemotherapy have roles in selected situations.

Each option carries its own risks and side-effect profile, from wound-healing issues after surgery to immune-related inflammation with immunotherapy, and each is weighed against alternatives including active surveillance for very early disease. Which combination is appropriate depends on stage, location, general health and the patient’s own priorities, and that judgment belongs to the treating team.

After treatment, follow-up skin checks continue for years, because people who have had one melanoma have a higher chance of developing another. The skills described earlier in this article, knowing your skin and noticing change, do not retire after a diagnosis. They become more important.

Frequently asked questions

What does early stage melanoma look like?

Early melanoma usually looks like a flat or slightly raised spot with uneven color and an irregular outline, often a mix of brown and black, sometimes with pink, white or blue areas. It may be a new spot or an existing mole that has started to change. At this stage it rarely hurts, and the key clue is that it looks different from your other moles and keeps evolving.

Does melanoma itch or hurt?

Sometimes, but not reliably. The NHS and Mayo Clinic list itching, tenderness and bleeding as possible symptoms, yet many melanomas cause no sensation at all. Pain tends to appear later, if it appears. An itchy mole that has also changed in size, shape or color deserves assessment; an unchanged mole that merely itches is more often irritation, though any persistent change warrants a look.

Can melanoma be pink or the same color as my skin?

Yes. Amelanotic melanoma produces little or no pigment and appears pink, red, reddish-brown or flesh-toned, often as a small bump or patch. Cleveland Clinic notes these are frequently mistaken for a pimple, insect bite or scar. The warning signs are persistence and growth: a spot that lasts for weeks when a pimple would have cleared, or steadily enlarges, should be examined.

How fast does melanoma grow?

It varies by type. Superficial spreading melanoma, the most common form, often changes gradually over months before growing deeper. Nodular melanoma, according to the NHS, can grow more quickly and may appear as a firm bump that enlarges over weeks. Because speed differs so much, a new or changing spot is best assessed promptly rather than watched for an extended period.

What does melanoma under a fingernail or toenail look like?

Subungual melanoma typically appears as a brown or black streak running lengthwise along the nail, most often on the thumb or big toe. Suspicious features include a band that widens over months, uneven darkening, or pigment spreading onto the skin around the nail. A bruise from injury, by contrast, moves outward and clears as the nail grows over a few months.

How big is a melanoma usually?

Mayo Clinic uses about 6 millimeters, roughly a quarter inch or a pencil eraser, as the size at which a pigmented spot deserves closer attention. That is a guide, not a rule. Melanomas can be detected when smaller, particularly if they are new or changing, and nodular melanomas are often small when first noticed. Size matters less than change and difference from your other moles.

Can a normal mole turn into melanoma?

Some melanomas arise within an existing mole, while others appear as entirely new spots on previously clear skin. Mayo Clinic notes that the first sign is often either a change in an existing mole or a new unusual growth. Ordinary moles are stable for years, so a long-standing mole that begins to grow, change color or develop an irregular edge should be assessed.

Is melanoma common in people with dark skin?

It is less common, because melanin absorbs some ultraviolet energy before it damages skin cells, but it does occur. Mayo Clinic notes that acral melanoma, which develops on the palms, soles and under the nails, is more common in people with darker skin. These locations are easy to overlook, so checking hands, feet and nails regularly is especially worthwhile.

Should I worry about a mole that itches but has not changed?

An itch alone, in a mole that looks exactly as it always has, is more often due to dry skin, friction or irritation than melanoma. That said, itching is one of the possible symptoms both the NHS and Mayo Clinic list. If the itch persists for several weeks, or the mole also bleeds, crusts, grows or changes color, a clinician should examine it.

How is melanoma diagnosed?

A clinician examines the spot, often with a dermatoscope, a magnifier with polarized light that shows structures beneath the surface. If the lesion looks concerning, a biopsy is performed under local anesthetic to remove all or part of it for microscopic examination. The pathologist confirms the diagnosis and measures depth and other features, which guide staging and the treating team’s recommendations.

References

• NHS: Melanoma skin cancer
• Cleveland Clinic: Melanoma
• MedlinePlus: Melanoma

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.