A dark spot on your cheek is almost always caused by extra melanin, the pigment that gives skin its color. The most common culprits are sun damage, hormonal changes, and post-inflammatory marks left behind after acne or irritation. Less often, a new or changing spot can signal something that needs medical attention. Figuring out which category yours falls into comes down to what the spot looks like, how long it’s been there, and whether it’s changing.
Sun Damage Is the Most Common Cause
Years of UV exposure cause clusters of pigment-producing cells to go into overdrive, creating flat, tan-to-brown spots called solar lentigines, often referred to as sunspots or age spots. They’re typically 3 to 20 millimeters across, oval-shaped, and evenly colored within each spot. The cheeks get hit hard because they face the sun directly, making them one of the first places these spots show up.
Sunspots become increasingly common with age. Over 90% of fair-skinned adults have them by their 60s, though they can appear much earlier with significant sun exposure, even in children. They don’t fade on their own once they’ve formed, and they tend to darken further with continued UV exposure. If you’ve spent a lot of time outdoors without sunscreen, cumulative damage is the most likely explanation for a spot that appeared gradually and hasn’t changed shape or color.
Hormonal Changes and Melasma
If your dark patch is larger, somewhat symmetrical, and appeared during pregnancy, while taking birth control, or during hormone therapy, melasma is a strong possibility. Sometimes called the “mask of pregnancy,” melasma creates brown or grayish-brown patches rather than small defined spots. It frequently shows up on the cheeks, forehead, nose, and upper lip.
Melasma has several recognizable distribution patterns. A lateral cheek pattern affects both cheeks. A malar pattern covers the cheeks and nose. A centrofacial pattern spreads across the forehead, cheeks, nose, and upper lip. The key driver is elevated estrogen and progesterone, which stimulate pigment production. That’s why it’s so closely linked to pregnancy, oral contraceptives, and hormone replacement therapy. Sun exposure makes it significantly worse, and it can persist long after the hormonal trigger is gone.
Post-Inflammatory Hyperpigmentation
If a dark mark appeared right where you had a pimple, a burn, a rash, or any kind of skin irritation, you’re likely looking at post-inflammatory hyperpigmentation (PIH). The inflammation triggers your skin to produce extra melanin as part of the healing process, leaving behind a flat discolored patch that can range from pink to dark brown depending on your skin tone. PIH is especially common in people with medium to dark skin. These marks do fade over time, but without treatment they can linger for months or even years, particularly on the face where sun exposure keeps reactivating pigment production.
Seborrheic Keratosis: The “Stuck-On” Spot
Not every dark spot on the cheek is flat. Seborrheic keratoses are benign growths that look waxy, scaly, and slightly raised, as if someone dripped candle wax onto your skin. They range from light tan to brown or black and have a characteristic “pasted on” appearance. These are extremely common, particularly after age 40, and they’re completely harmless. They don’t become cancerous. The main reason people want them removed is cosmetic, and a dermatologist can do that quickly if the appearance bothers you.
When a Dark Spot Could Be Melanoma
Most dark spots on the cheek are benign, but melanoma can appear anywhere on the face. The ABCDE criteria from the National Cancer Institute help you evaluate whether a spot warrants urgent attention:
- Asymmetry: one half of the spot doesn’t match the other
- Border: edges are ragged, notched, or blurred, with pigment spreading into surrounding skin
- Color: uneven shading with mixtures of brown, black, tan, white, gray, red, pink, or blue
- Diameter: larger than about 6 millimeters (roughly the size of a pencil eraser), though melanomas can be smaller
- Evolving: the spot has changed in size, shape, or color over recent weeks or months
A single feature doesn’t automatically mean cancer, but any spot that checks multiple boxes, or one that is clearly evolving, should be evaluated by a dermatologist promptly. A spot that bleeds, itches persistently, or looks noticeably different from your other moles also deserves professional attention.
Preventing Spots From Getting Darker
Whatever the cause, UV exposure will make a dark spot worse. Broad-spectrum sunscreen with at least SPF 30 is the single most effective tool for preventing existing spots from darkening and new ones from forming. You need to reapply every two hours during sun exposure for it to work properly.
If you’re prone to hyperpigmentation, tinted sunscreens offer an extra advantage. They contain iron oxide, which blocks visible light in addition to UV rays. Visible light, including light from screens and overhead fixtures, can trigger melanin production in darker skin tones, so this added protection matters. Mineral sunscreens based on zinc oxide or titanium dioxide are a good option if your skin is sensitive or reactive, since they’re less likely to cause irritation that could worsen pigmentation.
How Dark Spots Are Treated
Treatment depends on what’s causing the spot and how deep the pigment sits in your skin. For post-inflammatory hyperpigmentation and sunspots, topical treatments are the first step. Prescription hydroquinone at 4% concentration is the most established option. It works by slowing melanin production and is typically applied twice daily for two to six months. If you don’t see improvement after two months, it’s generally discontinued. Over-the-counter hydroquinone at 2% is available but notably less effective than prescription strength.
For stronger results, dermatologists sometimes use a combination approach: hydroquinone paired with a retinoid (which speeds cell turnover) and a mild anti-inflammatory. Retinoids on their own, starting at gentler concentrations like 0.3% retinol and working up to stronger prescription versions, also help fade spots over time by pushing pigmented cells to the surface faster.
Niacinamide, a form of vitamin B3 found in many over-the-counter serums, can help reduce pigmentation at concentrations around 4% or higher. It’s gentler than hydroquinone and safe for long-term use, making it a reasonable starting point if you prefer to try something before seeing a dermatologist.
Professional Procedures
When topical treatments aren’t enough, chemical peels using acids like glycolic, salicylic, lactic, or trichloroacetic acid can remove the outer layers of pigmented skin. These are done in a dermatologist’s office, and you may need a series of sessions spaced weeks apart. Laser treatments and intense pulsed light are other options, though these carry a risk of worsening pigmentation in darker skin tones if not done carefully. Your dermatologist can recommend the safest approach based on your skin type and the depth of pigmentation.
Melasma is the most stubborn form of facial hyperpigmentation to treat. It often improves with the same topical regimens but has a high recurrence rate, especially with continued sun exposure or hormonal fluctuations. Consistent sunscreen use is as important as any active treatment for keeping melasma from returning.