DefinitionMelasma is a skin condition where brown patches appear on the skin. These patches usually appear on the cheeks, nose, forehead, chin, and upper lip. Patches can also appear on the neck and forearms.Because it is common in pregnant women, melasma may be referred to as the mask of pregnancy.
|Common Sites on the Face for Melasma|
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CausesThe brown patches are due to an increased amount of melanin in the skin. The exact cause of increase in melanin is unknown. It is thought to be associated with hormones such as estrogen and progesterone. Sun exposure also plays a major role.
Risk FactorsMelasma is more common in women during their reproductive years, but it can occur in men. Other factors that increase may your chance of melasma include:
- Family history of melasma
- Being a woman of reproductive age
- Having a darker skin tone
- Getting too much sun exposure
- Taking birth control pills
- Using products that irritate the skin, such as cosmetics
- Certain medications, such as antiseizure drugs or hormone therapy
SymptomsThe only sign of melasma is dark patches of skin. It is not painful or itchy.Not all brown patches on your skin are melasma. Talk to your doctor about changes in your skin.
DiagnosisYour doctor will ask about your symptoms and medical history. Your skin will be examined. A lamp, called a Wood’s lamp, may be used to look at your skin. A small sample of skin may be taken for a biopsy. The sample will be sent to a lab to confirm the diagnosis.
TreatmentMelasma may go away on its own. If it does not go away, it may need to be treated. In general, treating melasma can be difficult. Talk with your doctor about the best treatment plan for you.
Removing CauseFactors that are causing the melasma may be removed. For example:
- Melasma associated with pregnancy may slowly fade after giving birth
- Melasma associated with birth control pills or hormone replacement therapy may fade after the medication is stopped
Ultraviolet Light ProtectionProtecting your skin from UV light is important in helping to fade melasma. This means avoiding sun and tanning bed exposure. Your doctor may recommend wearing sunscreen, clothing, and hats when outdoors.
Depigmenting MedicationsCertain medications, like bleaching creams, are used to lighten skin color. A common bleaching cream used to treat melasma is hydroquinone. This may also be used with other creams or combination of creams such as tretinoin, corticosteroids, azelaic acid or glycolic acid. These creams enhance the skin-lightening effect.Your skin may be sensitive to these medications. Use care and start slowly when first using them. It may take several months before you see an improvement.
Other TreatmentsOther treatments remove outer layers of the skin. These include:
- Chemical peel
- Microdermabrasion—removing top layer of skin
- Laser therapy
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