What Is Melasma? Triggers and Precautions in Care

What is melasma: It is a long-term pigment problem that appears on the face, mostly as symmetrical brown or grey-brown patches on both sides. It is harmless and does not turn into cancer, but it is stubborn and can recur. The strongest triggers are sunlight, visible light, and hormones such as estrogen and progesterone. The diagnosis should be made by a dermatologist, because other spots and some skin cancers can look similar. Cosmetic products do not treat melasma; at most they accompany strict sun protection and help avoid irritating the skin.

What does melasma look like and how does it appear?

In melasma, pigment cells produce excess melanin. The spots are flat, with often irregular borders; the colour can range from light brown to dark brown or bluish grey. They do not cause pain or itching. Sometimes mild redness accompanies them. The pattern of distribution helps the doctor describe the picture:

Also called the 'pregnancy mask' colloquially. It usually begins between ages 20 and 40, and about 90% of cases are women, but it is also seen in men. It is more frequent in people who tan easily or have naturally dark skin. A similar history in the family is also common: depending on the source, family history is reported at rates ranging from a third to more than half of patients.

Sun: Not only UV, but visible light too

Melasma's relationship with the sun is strong and is not limited to ultraviolet light. Visible light also stimulates melanin production and can worsen melasma, especially in darker skin. So a standard colorless cream alone may not always be enough. Even after a good result, pigment can return with summer sun.

• Tinted sunscreen: Tinted creams containing iron oxide provide extra protection against visible light. In a randomized study lasting about 5 months, those who used this cream saw less increase in spots than those who used a colorless cream.
• SPF rule: Use a broad-spectrum product with at least SPF 30 every day, even on cloudy days. Reapply every 2 hours, and immediately when you sweat or swim.
• Physical protection: A wide-brimmed hat, UV-protective sunglasses and shade cover what sunscreen misses.
• Tanning beds: They worsen melasma and can reduce the effect of treatment.

For the difference between filters, see the mineral and chemical sunscreen article; for why you should not stop in winter, see the winter sunscreen article. LED screens also appear on trigger lists, but the real share of daily screen use is unclear. Before changing your routine for screens, it is more sensible to establish daylight protection first.

The hormone connection

The link to hormones is important, but it is not the only explanation. Pregnancy and hormone use play a role in about a quarter of affected women. So melasma can also appear in someone who is not pregnant and does not use hormones.

If the spot does not fade after delivery, or started outside pregnancy, this is a reason to go directly to a dermatologist.

Other triggers

• Irritating products: Products that sting or burn can darken the spot.
• Perfumed soap, cosmetic and care products: Some can cause a reaction when combined with sunlight.
• Stress: Mentioned among the triggers.
• Some drugs: Some anti-seizure medications, photosensitizing drugs and newer targeted cancer drugs can be counted. Do not stop these drugs on your own.

Why is a dermatologist definitely needed?

Not every symmetrical spot on the face is melasma. Conditions that look similar include post-inflammatory spots, sun spots, drug-induced pigmentation and congenital spots. Some skin cancers can also resemble melasma. Diagnosis is important because a wrong product can deepen the spot, and early consultation makes treatment easier: as time goes on, the response may decrease.

For a rough distinction, the following can be looked at: melasma mostly makes symmetrical patches on both sides. Sun spots have defined borders, appear singly or in clusters, and remain all year. Post-inflammatory spots appear where a previous pimple or wound was. This distinction is not finalized at home; it only clarifies what you tell the doctor.

The examination looks at the skin, and if needed a Wood's lamp (ultraviolet lamp) or a dermatoscope is used. If there is any doubt, further tests such as a biopsy or thyroid test may be suggested. Note the contraceptive method you use, your pregnancy plans, your medications and the products you apply to your face; the doctor will ask about them.

Situations requiring prompt consultation

• The spot is one-sided, clearly irregular, or growing quickly.
• There are bumps, bleeding, crusting or a wound in the area.
• The same spot shows different colors such as black, red or blue.
• It is accompanied by itching, pain or burning. Melasma usually causes no pain or itching, so these symptoms suggest another cause.
• Darkening started after a new medication.
• It began outside pregnancy and comes with fatigue, sudden weight change or irregular periods.
• The appearance clearly affects your mood, social life or self-confidence.

Pigment depth determines the outcome

You do not need to make this distinction yourself, but it matters for expectations: the same cream can give different results in two people.

Options a doctor may suggest

In melasma treatment, several methods are often combined. Most of them are prescription; the doctor decides which, at what dose and for how long.

• Triple combination cream: Contains hydroquinone, tretinoin, and a medium-strength cortisone. It is described as the strongest topical option; clearing or improvement has been reported in 60-80% of cases.
• Single or double creams: Hydroquinone, tretinoin and mild corticosteroid can be used together or separately. They can cause dermatitis, so they should not be used for long without doctor supervision.
• Gentler options: Azelaic acid, kojic acid, vitamin C and cysteamine. Azelaic acid can cause stinging.
• Tranexamic acid: Available in applied or oral forms. If there is a history of blood clots, the doctor must be told.
• Procedures: Methods such as chemical peels, laser, light therapy and microneedling are considered as additions. They can worsen melasma or create new pigment, and the risk of recurrence is high. They should be planned only by an experienced doctor, together with medication.

Even with a treatment plan, results usually appear within 3-12 months; in long-standing melasma it may take longer.

Points to watch in care

The purpose of cosmetic care is not treatment, but preventing the skin from reacting and making sun protection sustainable. Do not expect a brightening serum alone to erase melasma.

1. Keep it simple. Choose a fragrance-free, non-stinging cleanser and moisturizer. Stinging or burning can darken the spot.
2. Test a new product. First apply it twice a day for 7-10 days on the inner arm or elbow crease; if there is no problem, move to the face.
3. Do not rub. Harsh peels, sharp granular products and brushes can increase the spot through irritation. Do not add a peel to your routine without consulting your doctor.
4. Mind the order. Apply the medication the doctor gave you first, then sunscreen, and makeup last.
5. Use makeup. Concealer makeup is a practical aid to hide spots while treatment continues.

Sample morning routine

The sequence below is not a prescription but a starting point derived from general rules. If your doctor has given a different plan, follow it.

• Wash with a fragrance-free, gentle cleanser, and pat dry without rubbing.
• If your doctor has recommended a product, apply it.
• Use a light moisturizer.
• Apply a tinted, broad-spectrum sunscreen with iron oxides to your face and neck.
• Take a product for reapplication in your bag, and do not forget a hat.

During pregnancy and breastfeeding

The main tool in this period is sun protection. Tinted creams with mineral filters can be chosen. Retinoids are not used in this period; consult your doctor. For other agents such as hydroquinone too, do not start on your own; proceed with products the doctor approves. After delivery, the spot often fades. Discuss when to start treatment with your doctor; if spots persist, have another examination without waiting for breastfeeding to end.

Common misconceptions about melasma

• It only appears in pregnant women. No. It can also appear in non-pregnant women and in men. Men make up about one in ten cases.
• It always disappears after delivery. It mostly fades, but not in everyone. In some people it lasts for years.
• It turns into cancer. No, melasma is not cancer and does not turn into cancer. However, since some skin cancers can resemble it, diagnosis is important.
• Sunscreen is not needed in winter. It is. Light continues on cloudy and short days too; protection continues in every season.
• Laser solves the problem in one session. It does not. These methods can worsen the picture in some people, and the risk of recurrence is high.

What should you expect?

Melasma should not be thought of as a problem that is cleared once and never returns. It may fade on its own, but it can also last for years and remain despite treatment. Long-term protection is therefore part of treatment. If you see slight darkening when summer comes, this is often the nature of melasma rather than a failure. It is useful to ask your doctor for a monitoring plan before summer starts.