Sun spots are flat brown patches that build up on the skin the sun reaches most, such as the face, the backs of the hands and the chest. They are harmless, but they are a record of past sun exposure. Moles are ordinary clusters of pigment cells in the skin, and almost all of them stay harmless for a whole lifetime. What matters is not how many you have, but whether one of them is changing - because a changing mole is the earliest sign of melanoma, and the earliest melanoma is the one that is easiest to cure.
The same eight facts on every condition comparison.
It is a flat area of pigment.
A solar lentigo is a defined patch of increased pigmentation linked to ultraviolet exposure.
It appears on sun-exposed skin.
Spots often develop on the face, hands, forearms and shoulders.
"Liver spot" is a misnomer.
The common name does not mean the liver is involved.
Diagnosis comes first.
Atypical spots can resemble melanoma in situ, so uncertain lesions are examined before any cosmetic treatment.
They are clusters of pigment cells.
Moles are usually benign collections of melanocytes.
They vary in appearance.
They can be flat or raised, skin-colored or pigmented.
They appear at different times.
Some are present at birth; others appear later.
New or changing moles need a check.
A stable familiar mole differs from an evolving lesion.
Flat brown spots Even tan to brown color.
Backs of the hands One of the most common sites.
Shoulders Clusters after years of sun.
Common mole Small, round, even color.
Atypical mole Larger, uneven border or color.
Congenital mole Present from birth.
Halo nevus Generated illustration. Mole surrounded by a pale ring.
Blue nevus Small blue-gray mole.
Repeated ultraviolet exposure changes pigment activity in a small area of skin. Extra melanin produces a persistent flat brown spot, rather than a raised growth.
Moles form when benign pigment cells cluster into small nests. The location and arrangement of these cells help explain why some moles are flat and others are raised.
Sun Spots. Usually become more noticeable in adult life after cumulative sun exposure.
Moles. Most ordinary moles appear during childhood and adolescence; new or changing adult lesions deserve attention.
Sun spots form when years of ultraviolet light make pigment cells produce extra melanin in one place. They build up slowly over decades.
Moles form when pigment cells grow in a cluster instead of spreading through the skin. Most appear in childhood and early adulthood.
Fair skin that burns easily and a family history of sun spots make them more likely.
The number of moles you have is largely inherited.
Evidence labels come from each condition’s own treatment list.
Speeds up how quickly pigmented surface cells are shed, so spots lighten gradually from the top down. It is the over-the-counter option with the best evidence in sun spots, and it improves the surrounding sun-damaged skin at the same time. Start two or three nights a week to avoid irritation, and expect three to six months before the difference is obvious.
Loosens the pigmented cells at the surface so they shed sooner, which lifts a little color out of a spot over months. It works better as the thing that helps a lightening cream get in than as a treatment on its own. Used too often it leaves skin irritated and more sun-sensitive, which on this page is exactly the wrong direction.
Applied to dry skin, left for about fifteen minutes and washed off rather than left on overnight. It suits people who want a lightening step without hydroquinone, or something to hold a result between courses of it. Most of the trial evidence is in melasma rather than sun spots, and the smell is the usual reason people stop.
A gentler relative of hydroquinone that releases a small amount of it slowly in the skin. It is a reasonable long-term option on a spot you are lightening slowly, and it does not sting, which matters because irritation on a sun spot can leave a darker mark. The effect is mild and takes months.
Lightens surface pigment modestly and adds a little to what sunscreen is doing during the day. It is easy to keep using for years, which is its real advantage here, since sun spots are a long game. On its own it will not clear an established spot.
Slows the handover of pigment from pigment cells to the skin cells above them, so a spot fades a little rather than disappears. Its strength is that it is well tolerated and does not sting, so it sits comfortably alongside a retinol without making the skin sore. Modest on its own.
Blocks the same pigment-making enzyme hydroquinone does, more weakly. It is nearly always sold combined with other lightening ingredients, and the studies behind it are studies of those combinations. It stings some people, and irritation on a sun spot is not a neutral event, particularly on medium and deeper skin tones.
The strongest cream for lightening a sun spot, applied thinly to the spot itself rather than the skin around it. It is used in a defined course of about three to four months with a break afterwards, not indefinitely, and it works best combined with a retinoid. It is slower than a single session of freezing or laser, and it is the option to prefer when treatment risk on deeper skin tones is the concern.
The prescription retinoid, and the one with real trial evidence in sun spots specifically. It lightens spots over about six to ten months and improves the sun-damaged skin around them at the same time. Expect dryness and flaking early on, and use it at night with daily sunscreen, since it leaves skin more sun-sensitive. Ask your doctor about it if you are pregnant or trying to become pregnant.
A stronger retinoid with good trial results in sun spots, used when tretinoin has not done enough. It works the same way, a little faster, and irritates more, so it is often started a few nights a week. Ask your doctor about it if you are pregnant or trying to become pregnant.
A few seconds of liquid nitrogen on each spot, done in the room, no anesthetic needed. The spot darkens, crusts and lifts off over one to two weeks. It suits a small number of spots rather than a whole hand, and its known cost is a permanent pale mark where too many pigment cells were destroyed, which is a bigger risk on medium and deeper skin tones.
IPL. The best option when there are many spots across a whole area such as the face, chest or the backs of the hands. Usually one to three sessions, with the spots darkening and flaking off over one to two weeks after each. It is aimed at contrast between spot and skin, so it works best on lighter tones and is used cautiously or not at all on deep skin.
The same pigment-shattering laser used for tattoo ink is used at low energy on individual sun spots, and it clears them reliably in one or two sessions. It is more precise than intense pulsed light and better for a few stubborn spots rather than a whole area. Settings have to be matched to the skin tone, since too much energy leaves a pale or a dark mark behind.
Delivers its energy in much shorter pulses, which breaks up pigment with less heat spilling into the skin around it. That lower heat is the reason it is often chosen for medium and deeper skin tones, where a darker mark afterwards is the main worry. It costs more than the older lasers and the results in sun spots are broadly similar.
Lightens spots across a whole area rather than one at a time, which suits the backs of the hands, the forearms and the chest where spots are scattered widely. Usually a course rather than a single treatment, and the result is a general evening out rather than each spot disappearing. Depth matters: a peel strong enough to leave the skin raw can leave a darker mark instead.
Fraxel. Treats the sun-damaged skin as a whole rather than targeting individual spots, so it improves texture and fine lines alongside the pigment. That makes it a reasonable choice when the spots are only part of what is bothering you. For clearing spots alone it is slower, dearer and less precise than freezing or a pigment laser.
Polishes off the very top layer of skin, which makes it briefly smoother and brighter. The pigment in a sun spot is held in ridges below that layer, so it is not reached. It is often sold as a treatment for spots and it is not one, and repeated sessions can irritate skin enough to leave marks of their own.
The standard for any mole that is genuinely in doubt: the whole mole is cut out under local anesthetic with a narrow margin of normal skin and sent for examination under a microscope. Taking all of it matters, because the pathologist has to see the full depth and the edges. It leaves a line scar, and results come back in a week or two.
A raised mole that catches on a razor or a collar can be shaved off flush with the skin under local anesthetic, leaving a flat pale mark rather than a line scar. It is a reasonable choice for a mole that is not suspicious, and the tissue still goes to the laboratory. Two honest limits: pigment left at the base can grow back, and a shave through a melanoma cuts across it rather than under it.
A small circular blade removes a small mole whole, down through the full thickness of the skin, and it is closed with a stitch or two. It suits moles smaller than the punch. Used to take a sample from part of a larger suspicious mole it can under-read the depth, so for those an excision is the better choice.
Sun spots usually persist and can increase with further ultraviolet exposure. They do not themselves become skin cancer, but sun-damaged skin can develop other lesions. A changing, rough or otherwise unusual spot needs assessment before cosmetic treatment.
Most moles remain harmless, but their appearance can change over a lifetime. A changing mole, a new unusual pigmented spot or one that looks different from the others needs examination. Monitoring should follow the person's individual risk.
Solar lentigines are benign, but they mark ultraviolet exposure and may coexist with other sun-damaged lesions. A changing or irregular spot needs assessment rather than an assumed age-spot diagnosis.
Most moles are benign. Having many or atypical moles can mark increased melanoma risk, and a changing lesion should be examined rather than assumed to be an ordinary mole.
Have a new, changing, unevenly colored or bleeding spot checked before using a fading treatment.
Arrange prompt assessment for an evolving, unusual or bleeding mole. Comparing a spot with your other moles is useful, but photographs cannot confirm a diagnosis.
The spots are harmless and do not turn into cancer. What they indicate matters - that much sun exposure makes other changes more likely, so watch and protect those areas.
The reassuring pattern is flat, one even color, a clear edge, stable over time, similar to its neighbors. The pattern that needs a check is changing, growing, more than one color, a ragged or blurred edge, itching, bleeding, or a spot unlike the rest. Being unsure is a reason to have it looked at, not to worry.
In-office treatment. Freezing works for a few spots; laser or intense pulsed light for many, usually over one to three sessions. Expect them to darken and flake off over one to two weeks. Creams work far more slowly.
The individual spot usually does not return. New ones keep appearing on sun-exposed skin unless the sun protection changes, which is why people who treat spots and change nothing else are back within a few years.
Sunscreen does not remove them, but it stops them darkening and slows new ones. Retinoids, vitamin C, niacinamide and short courses of hydroquinone lighten existing spots over three to six months, more gently than a procedure.
The one to be most cautious about. Freezing can destroy the pigment cells and leave a permanent pale mark, more noticeable on deeper skin tones and harder to correct than the original spot. Topical treatment first, conservative settings, a test spot, and a provider who treats deeper skin tones regularly is the safer path.
Use two checks together. ABCDE covers asymmetry, an uneven border, more than one color, a diameter above about 6 millimeters, and - most important - evolving, meaning changing. The ugly duckling check asks whether the mole looks like your others. A spot that fails either, or passes both but keeps changing, should be examined in person.
New moles keep appearing through the teens and twenties and become uncommon after about 40. Many new pigmented spots in older adults turn out to be seborrheic keratoses or sun spots. That is a reason to have a new spot identified, not to assume it is one of those.
Yes, and it is a reasonable request. What matters is how it is done — cut out under local anesthetic and sent to a laboratory. Lasering, freezing or burning leaves nothing to examine, so ask for the version that gets checked.
No. Your risk is higher than average and regular checks are worth doing, but most people with a high mole count never develop melanoma. The response is a schedule of skin exams, not worry.
Yes — most melanomas arise on skin that had no mole before. That is why a new spot that grows, or a sore that will not heal, deserves the same attention as a changing mole.
Moles commonly darken slightly in pregnancy, and skin stretching over a growing abdomen or breasts can change a mole's shape. Melanoma does occur in pregnancy, though. A mole that changes in shape, border or color should be looked at while you are pregnant, not after.
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