Brown dots on your skin are almost always harmless. The most common causes are freckles, age spots from sun exposure, and raised growths called seborrheic keratoses. Less often, brown spots can signal something that deserves a closer look, so knowing what different types look like helps you tell the routine from the concerning.
Freckles
Freckles are the smallest and most familiar brown spots. They’re genetically determined, typically 1 to 4 millimeters across, and tan to brown in color. You’ll find them in sun-exposed areas like the face, forearms, and shoulders. They tend to darken in summer and fade in winter because they’re caused by extra pigment deposited in the top layer of skin, not by extra pigment-producing cells. If your freckles have been with you since childhood and look the same year after year, they’re completely benign.
Age Spots (Solar Lentigines)
If you’re noticing flat brown patches that appeared later in life, especially on your face, hands, or forearms, these are likely solar lentigines, commonly called age spots or liver spots (they have nothing to do with your liver). They range from tan to dark brown and can be as small as a freckle or larger than a centimeter. Unlike freckles, they don’t fade when you stay out of the sun.
Age spots form because years of UV exposure cause the skin to produce roughly twice the normal number of pigment-making cells in that area, along with about twice the amount of pigment. They’re flat, evenly colored, and have a sharp border. They’re harmless on their own, though their presence tells you that patch of skin has accumulated significant sun damage over time.
Seborrheic Keratoses
These are the brown spots that look like they’ve been pasted onto your skin. Seborrheic keratoses are roundish or oval raised growths that range from yellow to brown to black, and they’re extremely common after age 40. The key feature is texture. They often look waxy, scaly, or slightly bumpy, sometimes with tiny cyst-like bubbles or a surface that resembles the ridges of a brain. Run your finger over one and you’ll feel it raised above the surrounding skin.
That “stuck-on” look comes from a buildup of keratin, the same tough protein that makes up your fingernails. Seborrheic keratoses can show up anywhere on the body except the palms and soles. They’re not caused by sun exposure and they don’t become cancerous. They can be irritating if they catch on clothing or jewelry, but they’re cosmetically the main reason people seek removal.
Moles
Moles are clusters of pigment-producing cells that form a defined spot, usually round or oval, uniformly brown, and smaller than a pencil eraser. Most people develop between 10 and 40 moles by adulthood, and they can appear anywhere on the body. A normal mole is symmetrical, has smooth borders, and stays the same over time. Moles that have looked the same for years are rarely a concern, but any mole that starts changing deserves attention.
Dermatofibromas
If you have a small, firm, brownish bump that feels like a BB pellet under the skin, it may be a dermatofibroma. These are benign nodules that often develop at sites of minor prior trauma, like an insect bite or a small cut. They’re most common on the legs. One easy way to check: pinch the skin on either side of the bump. A dermatofibroma will dimple inward rather than pop outward. This “dimple sign” is a classic feature. They don’t need treatment unless they bother you.
Melasma
Melasma looks different from the spots above. It appears as larger, irregular brown or grayish-brown blotches, typically across the forehead, cheeks, upper lip, nose, or chin. It’s driven by hormonal changes rather than aging alone, which is why it’s sometimes called “the mask of pregnancy.” Starting or stopping birth control pills, hormone replacement therapy, or becoming pregnant can all trigger it. Sun exposure makes it worse. Melasma isn’t dangerous, but it can be persistent and frustrating to treat because hormonal fluctuations keep driving pigment production.
Actinic Keratoses: A Precancerous Spot
Not all brown spots are harmless. Actinic keratoses are rough, scaly patches that develop on sun-damaged skin. They often feel like sandpaper before you even notice them visually, and they can be pink, red, or brown. They appear most often on the face, ears, scalp, forearms, and backs of the hands. About 10% of actinic keratoses will progress to squamous cell carcinoma (a type of skin cancer) over roughly two years if left untreated. That’s a high enough rate that dermatologists typically treat them when found.
Signs a Brown Spot Could Be Melanoma
Melanoma is the most serious skin cancer, and it can look like an ordinary brown spot in its early stages. The ABCDE checklist, developed by the American Academy of Dermatology, gives you five things to watch for:
- Asymmetry: one half of the spot doesn’t match the other half.
- Border: the edges are ragged, notched, or blurred, or pigment seems to spread into the surrounding skin.
- Color: the spot contains multiple shades of brown, black, or tan, or has areas of white, red, pink, or blue.
- Diameter: the spot is larger than 6 millimeters (about the size of a pencil eraser), though melanomas can sometimes be smaller.
- Evolving: the spot has changed in size, shape, or color over weeks or months, or it looks noticeably different from your other spots.
Any spot that bleeds without being injured, itches persistently, or grows rapidly also warrants evaluation. A good general rule: if a spot stands out from all your others, or if it’s changing, get it checked.
Removing Brown Spots
Harmless brown spots don’t need treatment, but many people want them gone for cosmetic reasons. The most common professional options are:
- Cryotherapy: liquid nitrogen is applied to the spot for five seconds or less with a cotton swab. As the treated area heals, the skin lightens. There’s a small risk of permanent scarring or discoloration.
- Laser or intense pulsed light: these destroy pigment-producing cells without damaging the skin’s surface. Most people need two to three sessions.
- Chemical peels: a solution removes the top layers of skin so fresher, more evenly pigmented skin can replace it. Redness can last several weeks, and you may need multiple treatments before seeing results.
Results from any of these approaches take weeks to months to fully appear. For age spots specifically, daily sunscreen use afterward is essential, or the spots will return. Over-the-counter products containing hydroquinone, vitamin C, or retinoids can gradually fade mild discoloration, though they work much more slowly than professional treatments.