Age spots are flat, oval patches of darkened skin that range from tan to dark brown or black. They typically measure between a tenth of an inch and half an inch across, roughly the size of a freckle up to a pencil eraser. They’re painless, completely smooth to the touch, and blend flush with the surrounding skin rather than rising above it.
Color, Shape, and Texture
The color of an age spot can fall anywhere on the spectrum from light tan to deep brown to black, but within a single spot, the color stays uniform. That evenness is one of the hallmarks that separates an age spot from something more concerning. The edges tend to be well-defined, sometimes with a slightly irregular, “moth-eaten” look, particularly on the face. On closer inspection, especially on facial skin, you may notice a faint, lacy pattern within the spot.
Age spots are always flat. If a dark spot feels rough, scaly, or raised when you run your finger over it, you’re likely looking at something different, such as a seborrheic keratosis. These are another common, harmless skin growth that tends to appear waxy or stuck-on, often with tiny cracks or pore-like openings on the surface. Age spots have none of those textural features. They look like someone painted a small, even dot of pigment directly onto the skin.
Where They Show Up
Age spots appear on the parts of your body that have accumulated the most sun exposure over your lifetime. The backs of the hands are the single most common location. Beyond that, they frequently develop on the face, shoulders, upper back, forearms, and the tops of the feet. You won’t typically find them on skin that stays covered, like your torso or inner arms, because UV exposure is what drives the excess pigment production in those skin cells.
How They Differ From Freckles
At first glance, age spots and freckles can look similar, but there are reliable ways to tell them apart. Freckles are smaller and tend to cluster in groups. They appear in childhood and often fade as you get older, especially during months with less sun. Age spots do the opposite: they develop later in life, usually after 40 or 50, appear as single, isolated spots, and are larger than freckles. Once an age spot forms, it doesn’t fade on its own with seasonal changes. It stays put.
Both freckles and age spots favor sun-exposed areas like the face, hands, and arms. The key difference is timing and behavior. If you’re noticing new flat brown spots for the first time in midlife, those are almost certainly age spots rather than freckles.
When a Spot Might Not Be an Age Spot
The vast majority of flat brown spots that appear on sun-exposed skin after age 40 are harmless. But because melanoma can sometimes mimic an age spot in its earliest stage, it helps to know what to look for. Dermatologists use a simple checklist called the ABCDEs:
- Asymmetry: one half of the spot doesn’t mirror the other
- Border: the edges are blurry, ragged, or notched rather than well-defined
- Color: the spot contains multiple colors or shades (brown mixed with red, white, or blue-black)
- Diameter: the spot is larger than a pencil eraser, roughly 6 millimeters
- Evolving: the spot is changing in size, shape, color, or height, or developing new symptoms like itching or scabbing
A true age spot will fail this checklist on every count. It’s symmetrical, has a clean border, is one uniform color, and stays the same over time. If a spot checks even one of these boxes, it’s worth having a dermatologist take a look.
There’s also what’s called the “ugly duckling” sign. If you have many freckles or spots and one of them just looks different from all the rest, that standout deserves attention, even if you can’t pinpoint exactly what’s off about it.
What Causes the Pigment Buildup
Age spots form when pigment-producing cells in a small area of skin become overactive after years of UV exposure. These cells churn out more melanin than the surrounding skin, and that excess pigment concentrates in the top layer, creating a visible dark patch. The pigment stays confined to the surface layer of skin, which is why age spots are flat and don’t have any texture change. They’re not a sign of damage deep in the skin, just a cosmetic response to cumulative sun exposure over decades.