Hyperpigmentation is a condition that causes the skin to darken. It can:

  • occur in small patches
  • cover large areas
  • affect the entire body

While increased pigmentation usually isn’t harmful, it can be a symptom of another medical condition. Learn about:

  • types
  • causes
  • how to treat it

There are several types of hyperpigmentation, the most common being melasma, sunspots, and post-inflammatory hyperpigmentation.

  • Melasma: Melasma is believed to be caused by hormonal changes and may develop during pregnancy. Areas of hyperpigmentation can appear on any area of the body, but they appear most commonly on the stomach and face.
  • Sunspots: Also called liver spots or solar lentigines, sunspots are common. They’re related to excess sun exposure over time. Generally, they appear as spots on areas exposed to the sun, like the hands and face.
  • Post-inflammatory hyperpigmentation: This is a result of injury or inflammation to the skin. The most common cause of this type is acne.

Darkened areas on the skin is the main symptom of hyperpigmentation. Patches can vary in size and develop anywhere on the body.

The biggest risk factors for general hyperpigmentation are sun exposure and inflammation, as both situations can increase melanin production. The greater your exposure to the sun, the greater your risk of increased skin pigmentation.

Depending on the type of disorder, other risk factors for hyperpigmented patches may include:

  • oral contraceptive use or pregnancy, as seen with melasma
  • darker skin type, which is more prone to pigmentation changes
  • drugs that increase your sensitivity to the sunlight
  • trauma to the skin, such as a wound or superficial burn injury

A common cause of hyperpigmentation is an excess production of melanin. Melanin is a pigment that gives skin its color. It’s produced by skin cells called melanocytes. Several different conditions or factors can alter the production of melanin in your body.

Certain medications can cause hyperpigmentation. Also, some chemotherapy drugs can cause hyperpigmentation as a side effect.

Pregnancy changes hormone levels and can affect melanin production in some women.

A rare endocrine disease called Addison’s disease can produce hyperpigmentation that’s most obvious in areas of sun exposure, such as the face, neck and hands, and areas exposure to friction, such as elbows and knees.

The hyperpigmentation is a direct result of an increased level of a hormone in your body that results in increased melanin synthesis.

Excessive sun exposure can also cause an increase in melanin.

A dermatologist can diagnose the cause of your hyperpigmentation. They will request your medical history and give you a physical exam to determine the cause. In some cases, a skin biopsy can narrow down the cause.

Topical prescription medication can treat some cases of hyperpigmentation. This medication usually contains hydroquinone, which lightens the skin.

Utilizing topical retinoids also assists with lightening dark spots of the skin. Both of these medications can take a few months to lighten darkened areas.

Home care sometimes includes over-the-counter medications that may lighten dark spots. These medications don’t contain as much hydroquinone as prescription medications. Home care also includes using sunscreen.

Sunscreen is the single most important factor in improving most causes of hyperpigmentation. Look for:

  • a physical blocking sunscreen, preferably with zinc oxide as the main active ingredient
  • at least SPF 30-50
  • broad spectrum

Use daily. Reapply every two hours if out in the sun or more frequently if sweating or swimming.

There are also skin disorders where visible light may play a role in perpetuating the hyperpigmentation, such as in melasma.

In that case, look for a mineral sunscreen that also has iron oxide in it, which can block some visible light. Use daily. Wear sun-protective clothing that’s SPF-infused.

Shop for SPF-infused clothing online.

Your doctor may also suggest laser treatment or chemical peels to reduce hyperpigmentation, depending on the cause of your hyperpigmentation.

It’s not always possible to prevent hyperpigmentation. However, you can protect yourself by:

  • using sunscreen with an SPF of at least 30 can help
  • wearing hats or clothing that block sunlight
  • avoiding the sun during the time of the day when it’s strongest, which is typically 10 a.m. – 4 p.m.

Avoiding certain medications may also help prevent hyperpigmentation.

Hyperpigmentation is not generally harmful and usually isn’t a sign of a serious medical condition.

In some cases, dark areas will fade on their own with good sun protection. In other cases, more aggressive treatment is needed. There’s no guarantee that the dark spots will fade completely, even with treatment.