Understanding Melasma: Causes, Treatments, and Prevention
Melasma is also known as mask of pregnancy. Melasma is a skin condition that causes darker patches and spots on the skin, typically occurring on the face and differing in shade from your natural skin tone. It has a higher incidence among women of childbearing age, hence sometimes referred to as pregnancy mask or chloasma.
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The Predisposing Factors
Genetic Susceptibility
A family history of melasma can increase the likelihood of its occurrence, suggesting a genetic predisposition.
Sunlight Exposure
Prolonged sun exposure, especially without adequate protection, is a significant trigger for melasma. UV radiation stimulates melanocytes, leading to increased melanin production.
Hormonal Fluctuations
Pregnancy, use of oral contraceptives, and hormone replacement therapy can cause hormonal fluctuations, which in turn can trigger and exacerbate melasma.
Understanding the Pathology
Initially, the pathology of melasma was believed to involve only melanocytes. However, recent research has found that the pathological mechanisms associated with melasma actually extend beyond the realm of skin pigment cells, including interactions of keratinocytes, abnormal activation of melanocytes, melanin aggregation in the epidermis and dermis, increased number of melanocytes, angiogenesis, basement membrane damage, abnormal extracellular matrix of the skin, and photoaging, among various factors.
Classification of Melasma
While early studies classified melasma into epidermal, dermal, or mixed type based on Wood’s lamp examination, recent studies using laser confocal microscopy have shown that in fact, all cases of melasma are mixed type.
Treatment Methods
Topical Medication Application
Hydroquinone: Considered one of the most effective melanogenesis inhibitors, hydroquinone prevents melanin production by inhibiting tyrosinase. However, prolonged use of high concentrations of hydroquinone may lead to side effects, leading to the exploration of alternatives such as arbutin, niacinamide, tranexamic acid, and cysteamine.
Oral Therapy
Oral tranexamic acid, Pycnogenol, and glutathione are commonly used in conjunction with topical medication application for treating melasma.
Chemical Peels
Chemical peels, including glycolic acid, Jessner’s solution, and retinoic acid, accelerate the renewal of epidermal keratinocytes and melanin regression.
Microneedle Radiofrequency
Microneedle radiofrequency stimulates collagen production and improves pathological changes associated with melasma tissue, making it a valuable adjunctive method for treatment.
Sunscreen and Photoprotection
Sunscreen is crucial in preventing the deepening of existing pigmentation and the formation of new pigmentation. Regular application of sunscreen, even indoors, is essential.
Conclusion
Melasma may affect one’s appearance and confidence, but with appropriate treatment and preventive measures, its impact can be minimized. It is essential to consult a dermatologist for personalized treatment plans and maintain a positive attitude throughout the process.
