Age spots are flat, brown patches of skin caused by years of sun exposure. They’re extremely common in adults over 50, though younger people who spend significant time in the sun can develop them too. Despite the name, age itself isn’t the direct cause. Accumulated ultraviolet light damage is.
How Age Spots Form
Your skin contains cells that produce melanin, the pigment responsible for your skin color. When ultraviolet light hits your skin repeatedly over years, it triggers nearby cells to release signals that ramp up melanin production in specific areas. Instead of producing an even tan, these overstimulated pigment cells deposit excess melanin in concentrated clusters near the skin’s surface. The result is a distinct brown spot that doesn’t fade when you stay out of the sun.
This process also disrupts normal skin cell turnover, meaning the pigment-heavy cells stick around longer than they should. That’s why age spots tend to be permanent without treatment. They aren’t caused by aging directly, but decades of cumulative UV exposure means they rarely appear before middle age.
What They Look Like
Age spots are flat and smooth with a round or oval shape. They range from light to medium brown and can be as small as a freckle or larger than a centimeter across. They show up most often on areas that get the most sun: the backs of your hands, forearms, face, shoulders, and upper back. They don’t hurt, itch, or have any texture to them.
People of all skin types can develop age spots, but they’re more common in people whose skin sunburns easily.
Age Spots vs. Skin Cancer
Most brown spots on sun-exposed skin are harmless. But because melanoma can look similar in its early stages, it’s worth knowing the difference. Dermatologists use a simple ABCDE framework to flag spots that need a closer look:
- Asymmetry: One half of the spot doesn’t match the other.
- Borders: Edges that are blurry, irregular, or uneven.
- Color: Multiple colors or uneven shading within a single spot. Age spots are typically one uniform color.
- Diameter: Anything larger than about 6 millimeters, roughly the size of a pencil eraser.
- Evolving: A spot that changes in shape, size, color, or texture over time.
Age spots don’t grow or change shape quickly. If a spot checks any of those boxes, a dermatologist can examine it with a specialized magnifying tool called a dermoscope, or take a small biopsy to rule out something more serious.
Prescription and Over-the-Counter Treatments
If age spots bother you cosmetically, topical treatments are the most common first step. Prescription options include hydroquinone (a bleaching cream), retinoids like tretinoin, and mild steroids. These work by gradually fading pigment over the span of several months, so they require patience and consistent use.
Over-the-counter fade creams are also available without a prescription. The most effective ones contain glycolic acid or kojic acid, both of which work by gently exfoliating the top layers of skin and slowing melanin production. Results from OTC products are slower and more subtle than prescription-strength options, but they can make a noticeable difference over time.
Professional Removal Procedures
For faster or more complete results, dermatologists offer several in-office procedures. Cryotherapy uses extreme cold to destroy the excess pigment in the targeted spot. The treated area forms a scab that typically heals within one to three weeks. You may need more than one session to fully remove a spot.
Laser treatments work by breaking apart melanin clusters beneath the skin’s surface. Chemical peels and microdermabrasion take a different approach, removing the outermost skin layers so that fresh, evenly pigmented skin replaces the spotted surface. All of these options involve some temporary redness or peeling, and results vary depending on the size and depth of the spots.
Why Home Remedies Can Backfire
Lemon juice and apple cider vinegar are among the most popular DIY age spot treatments, but both carry real risks. Lemon and lime juice contain compounds called psoralens that cause a phototoxic reaction when your skin is exposed to sunlight afterward. Instead of fading a spot, this can produce a larger, darker mark or even a second-degree burn. The resulting rash, called phytophotodermatitis, typically appears one to three days after sun exposure and can last for months.
Apple cider vinegar is highly acidic and can burn skin with prolonged contact. Any existing blemishes or open areas on your skin are especially vulnerable, and the irritation itself can trigger hyperpigmentation, the exact problem you were trying to fix. If you want to lighten age spots at home, commercially formulated products with controlled concentrations of active ingredients are a far safer choice than kitchen-counter acids.
Prevention
Because age spots are driven by cumulative UV damage, the most effective prevention is consistent sun protection. Broad-spectrum sunscreen applied daily, protective clothing, and avoiding peak sun hours all slow the accumulation of melanin damage that eventually produces visible spots. This matters even if you already have age spots. Continued unprotected sun exposure darkens existing spots and creates new ones, while sun protection can keep treated areas from re-pigmenting after removal.