Liver spots are flat, tan-to-brown patches of skin caused by years of sun exposure. They have nothing to do with your liver. The name likely stuck because the spots can be a similar color to liver tissue, but they’re purely a skin condition triggered by ultraviolet radiation. You’ll also hear them called age spots or, in medical terms, solar lentigines.
Why They’re Called Liver Spots
The name is misleading. Liver spots don’t signal liver disease, liver damage, or any internal problem. The connection is purely cosmetic: the dark brown color of these spots resembles the color of liver. Their medical name, solar lentigines, is more accurate. “Solar” points to the sun, and “lentigo” comes from the Latin word for lentil, describing their small, flat shape.
What Causes Them
Liver spots form when years of UV exposure permanently change how skin cells behave. When UVB rays hit your skin repeatedly, they damage the DNA in surface skin cells called keratinocytes. Those damaged cells begin continuously producing an inflammatory signal (a protein called TNFα) that never switches off. This signal triggers a chain reaction: nearby pigment-producing cells, called melanocytes, get locked into an “always on” state, pumping out excess melanin in that area indefinitely. Unlike a tan, which fades when you stop getting sun, this activation is permanent because the underlying cellular signaling loop sustains itself.
Cumulative lifetime sun exposure is the primary driver. Research has also shown that sun exposure earlier in life contributes more heavily to their formation, meaning damage from your 20s and 30s can show up as spots decades later.
Who Gets Them
Fair-skinned people who burn easily are most susceptible. Among people with lighter skin tones (those who always burn and tan minimally or not at all), over 90% develop liver spots by age 50. But they aren’t exclusive to light skin. Liver spots and mottled pigmentation are also common features of sun-aged skin in East and Southeast Asian populations.
The biggest risk factor is simply how much sun your skin has absorbed over your lifetime. People who’ve spent significant time outdoors, used tanning beds, or lived in sunny climates are more likely to develop them, regardless of their ethnic background.
What They Look Like
Liver spots are flat, oval or circular patches ranging from tan to dark brown. They typically measure between about 2.5 millimeters (the size of a freckle) and 13 millimeters (roughly half an inch) across, though they can cluster together and appear larger. They show up most often on areas that get the most sun: the backs of your hands, forearms, face, shoulders, and upper back. The spots have clearly defined edges and a uniform shade of brown. They don’t itch, don’t feel raised, and don’t change texture.
When a Spot Needs a Closer Look
A benign liver spot is one uniform shade of light brown and has smooth, regular borders. The concern is when a spot starts looking different from that pattern. A spot with multiple colors, ranging from light brown to black in an irregular pattern, warrants evaluation by a dermatologist. Other signs to watch for include an irregular or scalloped border, rapid changes in size, or a spot that looks noticeably different from the others around it.
Distinguishing a harmless liver spot from early melanoma on sun-damaged facial skin is genuinely difficult, even for trained clinicians. Research published in the British Journal of Dermatology found that the standard “ABCD” screening rule (checking asymmetry, border, color, and diameter) performs poorly when comparing liver spots to a type of early melanoma called lentigo maligna, particularly on the face. Both can appear as flat brown patches in the same locations. This is why any new or changing spot on sun-exposed skin is worth having a dermatologist examine, ideally with a dermatoscope, a magnifying instrument that reveals structural details invisible to the naked eye.
Treatment Options
Liver spots are harmless, so treatment is cosmetic. The two main approaches are topical creams and in-office procedures.
Topical Creams
Prescription-strength lightening creams typically combine a bleaching agent with a retinoid and sometimes a mild anti-inflammatory. These work by slowing melanin production and speeding up skin cell turnover so the pigmented cells shed faster. In clinical trials, patients using a prescription triple-combination cream saw a measurable reduction in both the number of spots and the amount of melanin in treated skin within the first two weeks. Results continue to improve over several months of use. Over-the-counter options containing lower concentrations of lightening agents are also available but work more slowly and less dramatically.
In-Office Procedures
Cryotherapy, where a dermatologist applies a brief burst of liquid nitrogen to freeze the spot, is one of the most effective options. A comparative trial found that cryotherapy was about 50% more likely to produce an excellent result than laser treatment with argon or CO2 lasers. The frozen spot typically darkens, scabs, and peels off over one to two weeks, revealing lighter skin underneath. Some temporary redness or mild discoloration at the treatment site is normal.
Newer laser technologies, including Q-switched and picosecond lasers, target pigment more precisely and are widely used today for spot removal. Chemical peels and intense pulsed light (IPL) treatments are other options, each working by removing or breaking up the pigmented surface layer of skin. Your dermatologist can recommend the best fit based on your skin tone, the number of spots, and their location.
Prevention
Since liver spots are driven by cumulative UV damage, sun protection is the most effective prevention strategy. A broad-spectrum sunscreen with SPF 50+ and balanced UVA and UVB protection is recommended specifically for preventing pigmentary disorders like liver spots. SPF 30 is a reasonable minimum for everyday use, but higher protection matters if you already have spots or are prone to pigmentation changes.
Application technique matters as much as the SPF number. Most people apply far less sunscreen than the amount used in SPF testing. The standard tested amount is 2 milligrams per square centimeter of skin, which works out to roughly a teaspoon for your face and neck. Reapplying within the first hour of sun exposure helps compensate for the fact that most people under-apply on the first coat. Reapply again every two hours, or sooner after swimming or sweating.
Sun-protective clothing, wide-brimmed hats, and seeking shade during peak UV hours (typically 10 a.m. to 4 p.m.) all reduce the cumulative exposure that drives liver spot formation. These measures won’t erase existing spots, but they slow the appearance of new ones and help prevent treated spots from returning.