How Does Melasma Develop?
Melanocytes in the epidermis and dermis are stimulated to produce more melanin than normal. UV radiation, visible light, and heat are the strongest triggers; hormones (pregnancy, oral contraceptives, thyroid disorders) and genetics determine who is susceptible. Because melanocytes retain a "memory" of hyperactivation, melasma tends to recur during sunny seasons—which is why melasma treatment focuses on management, not a permanent cure.
Epidermal, Dermal, and Mixed Melasma
Epidermal melasma: brown with well-defined borders, enhanced under a Wood's lamp—responds well to topical treatments and chemical peels. Dermal melasma: slate gray or bluish-gray with poorly defined borders, fades slowly, and responds poorly to topicals—often requiring multiple sessions of low-fluence laser toning. Mixed melasma presents with both components and is the most common type among Vietnamese individuals. Correct classification determines the treatment plan, making skin analysis an essential step.
How Does Melasma Differ from Freckles and Sun Spots?
Freckles are small, scattered macules that darken with sun exposure and often appear in childhood; sun spots (solar lentigines) are well-defined round patches seen in middle-aged adults. Melasma presents as larger, symmetrical patches influenced by hormonal factors. These three conditions respond differently to laser therapy: freckles and sun spots generally respond quickly, whereas melasma requires a cautious approach, as high-energy lasers can exacerbate hyperpigmentation.
Why Does Melasma Treatment Often Fail?
Three common reasons: inadequate sun protection (using sunscreen in insufficient amounts, not wearing hats, or not avoiding heat), using non-regulated creams containing corticosteroids that thin the skin and trigger severe rebound hyperpigmentation, and undergoing aggressive, high-energy laser treatments at non-physician facilities that cause melasma to spread. Consistency with a 3–6 month regimen followed by long-term maintenance is essential to sustain results.
What Does BonBoz Do?
Our dermatologists assess your skin to classify the melasma type, review your hormonal history and past product use, prescribe medical-grade topical brightening agents (which may be combined with oral medications in select cases), guide you on proper sun protection, and consider a tailored course of chemical peels or laser toning when indicated. You will be clearly informed: melasma improves gradually, requires maintenance, and any promise of "curing melasma in just a few sessions" is medically unfounded.
