Overview of Melasma
Melasma, occasionally termed chloasma, is a widespread skin disorder characterised by patches of darker pigmentation or freckle-like spots, most commonly on the face. The discolouration may range from light brown to dark brown and even blue-grey, often appearing on the cheeks, bridge of the nose, forehead, chin and just above the upper lip. Melasma generally first emerges between ages 20 and 40 and affects about 90 % of women who develop it. It is particularly prevalent during pregnancy, frequently called the mask of pregnancy, with roughly 15 % to 50 % of expectant mothers experiencing it. Individuals with deeper skin tones or a strong tanning response are at higher risk. Though entirely benign, these spots typically deepen in colour through summer and fade somewhat in winter.
Types of Melasma
This condition is divided into three categories based on pigment depth: 1. Epidermal, well-defined dark-brown patches that respond favourably to treatment 2. Dermal, light-brown or bluish areas with indistinct borders that are less treatment-responsive 3. Mixed, the most common form, combining brown and bluish hues, with partial improvement under therapy
Signs and Symptoms of Melasma
While melasma most frequently manifests on the face, any sun-exposed area, such as the neck or forearms, can be involved. Common indicators include:
- Skin patches darker than the individual’s normal tone
- Symmetrically mirrored marks on both sides of the face
- Lesions located on the cheeks, forehead, nose bridge and chin
What causes Melasma?
Melasma arises when the melanocytes, the cells that produce melanin, the pigment defining skin colour, manufacture an excess of this substance within certain skin layers. Although harmless, these discoloured areas can be cosmetically bothersome and often darken over time. The underlying reasons are not completely understood, but several risk factors have been identified:
- Family history: about 60 % of people with melasma have a relative affected.
- Hormonal changes: around 25 % of women develop melasma during pregnancy or while using oestrogen/progesterone oral contraceptives, intrauterine devices or hormone therapy.
- Thyroid disorders: abnormal thyroid function can influence pigment production.
- Sun exposure: ultraviolet light intensifies melanin synthesis and worsens patches.
- Phototoxic reactions: some medications (e.g. cancer drugs) and cosmetic ingredients may sensitize the skin to light, leading to discolouration.
How do you treat Melasma?
In many cases, melasma fades on its own, particularly when linked to pregnancy or contraceptive use. However, it can persist for years in some individuals. Treatment typically combines preventive measures, topical agents and procedures, often overseen by a dermatologist:
- Sun protection: daily application of a broad-spectrum, water-resistant sunscreen (SPF 30+), wearing a wide-brimmed hat and seeking shade when possible.
- Hormonal adjustment: stopping or changing oral contraceptives or IUDs if hormone-related.
- Cosmetic camouflage: specialised makeup to mask discoloured areas.
- Topical creams:
1. Hydroquinone (2–8 %) 2. Retinoids (vitamin A) 3. Ascorbic acid (vitamin C) 4. Azelaic acid (20 %) 5. Combined formulations
- Chemical peels: superficial to medium-depth peels remove surface pigment layers but often have mixed or unpredictable outcomes.
- Laser therapy: various light-based modalities, such as Q-switched or fractional lasers, fragment melanin for gradual clearance.
It’s crucial to recognise that melasma often shows a gradual improvement with therapy, especially when patches have been established for a prolonged period. Patients and clinicians should be aware that visible changes often take months to emerge. Because melanocyte activity and pigment clearance occur slowly, achieving noticeable lightening usually requires a long-term commitment. Even after successful intervention, discolouration may recur.
What potential issues accompany Melasma?
Melasma itself is harmless and unconnected to any serious health condition. It is not malignant, nor does it elevate your chances of developing skin cancer. Nonetheless, many individuals experience emotional distress and self-consciousness due to visible changes. Moreover, treatments can bring unwanted side effects, including skin soreness or eczema, underscoring the necessity of professional dermatological guidance.
When is it appropriate to consult a doctor for Melasma?
Any time you detect unusual dark patches or shifts in your skin’s appearance, it is advisable to seek medical advice since melasma can resemble other disorders. Your physician might refer you to a dermatologist for detailed assessment and targeted treatment. Additionally, scheduling routine skin examinations with your general practitioner or a dedicated skin cancer clinic will help distinguish benign pigment changes from potential malignancies.
Can Melasma be prevented?
Although not every instance of melasma is avoidable, adopting robust sun protection practices, such as applying a water-resistant, broad-spectrum sunscreen (SPF 30+), donning long-sleeved garments, and using hats and sunglasses, can help minimise your likelihood of developing it.