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Melasma is a common chronic acquired disorder of hyperpigmentation found worldwide. The relationship between sun exposure and melasma exacerbation is commonly reported, as is the use of broad-spectrum sunscreens in treating melasma [1]. However, the seasonal variations in the prevalence or incidence of melasma are not well established, having only been examined in a single-center study in Nepal [2]. In the absence of large-scale clinical epidemiological studies, we used Google search data to conduct an ecological study of seasonal patterns of public interest in melasma.

Seasonal variation in Google search interest for melasma