Where skin color comes from
Skin gets its color mainly from melanin, a pigment made by cells called melanocytes. Everyone has these cells, and they make more or less pigment depending on genetics, hormones, sun exposure and other factors. Uneven skin tone, or hyperpigmentation, appears when pigment collects more heavily in certain areas than in the surrounding skin. The result can be small spots, larger patches or a general blotchiness.
Uneven tone is very common and is usually harmless. Still, it can bother people, and it is worth understanding what is going on before trying to change it.
Common causes
Sun exposure. Ultraviolet light prompts melanocytes to make more pigment. Repeated exposure over the years can leave flat brown spots on the face, hands, shoulders and chest. These are often called sun spots or age spots, even though they come from sun exposure rather than age as such.
Inflammation and injury. After a pimple, bug bite, scrape, rash or burn, the skin can leave behind a darker mark once the inflammation heals. This is known as post-inflammatory hyperpigmentation. It tends to be more noticeable and longer-lasting in deeper skin tones, and it often fades gradually over weeks to months, sometimes longer. Picking at blemishes generally makes these marks worse, a point covered in the article on acne prone skin.
Hormonal changes. Patches of darker skin, commonly on the cheeks, forehead or upper lip, can appear during pregnancy or with some hormonal medications. This is often called melasma. It is discussed in a general way in pregnancy skin changes. Melasma can be triggered or worsened by sun, and it can be stubborn, so a clinician’s advice is useful.
Some medications and conditions. Certain medicines and health conditions can affect pigment, and so can some products. Citrus essential oils and a few other ingredients can react with sunlight and leave marks, which is explained in photosensitizing oils.
Friction and irritation. Repeated rubbing, harsh scrubbing or shaving irritation can darken skin in the affected area over time.
Sun care is the foundation
Whatever the cause, sunlight tends to deepen existing dark spots and slow their fading. For that reason, sun protection is the single most consistent piece of advice for uneven tone. In general terms, that means:
- wearing a broad-spectrum sunscreen on exposed skin and reapplying as directed on the label
- using shade, hats and clothing, especially in the middle of the day
- remembering that UV reaches skin on cloudy days and through car windows
No skincare product can fully work against ongoing sun exposure. Natural skincare and sun protection looks at how gentle routines and sun habits fit together. If you spend a lot of time outdoors in summer, summer skin care has more ideas.
What gentle care can and cannot do
Dark spots usually fade slowly, if they fade at all. A few general points set realistic expectations:
- Gentle cleansing and moisturizing help keep skin calm. Calm skin is less likely to form new marks from irritation.
- Mild exfoliation may help surface cells turn over, but too much of it irritates and can create more discoloration. Gentle exfoliation is better than frequent scrubbing, and natural exfoliants cover softer options.
- Popular home remedies such as raw lemon juice, undiluted vinegar or baking soda are widely shared, but they can irritate or burn skin, and lemon juice combined with sun can cause marks. They are best avoided.
- Plant-based ingredients are often described as brightening. Evidence for most of them is limited, and results, if any, are typically modest and slow. A face serum or mask may feel nice, but it is sensible not to expect dramatic change.
- Soaps and cleansers do not lighten dark spots. Claims that a bar will fade pigmentation should be treated with caution, and no soap should be expected to do it.
If you try something new, do a patch test first. Products that irritate can make pigmentation worse, so a gentler approach is usually wiser, even though it feels slower.
Professional options exist, including prescription creams and in-clinic treatments. They are better discussed with a doctor or dermatologist, who can assess your skin type and cause, because the wrong treatment for your skin tone can backfire.
Makeup and acceptance
Makeup, tinted sunscreen and color-correcting products can even out the look of skin on a given day. Many people also come to feel comfortable with natural variation in their skin. Neither choice is wrong.
Spots that should be checked
Most dark spots are benign, but changes in a skin spot can occasionally signal something more serious, including skin cancer. See a doctor or dermatologist promptly if you notice a spot that:
- changes in size, shape or color
- has irregular edges or several colors
- itches, bleeds, crusts or does not heal
- looks different from your other spots
- appears quickly or is raised and growing
Do not try to diagnose a spot yourself or treat it with home remedies. Also seek advice if patches appear suddenly, spread, or arrive with other symptoms. This article gives general information only, not medical advice.