Reports Suggest that heat alone can activate melanocytes and contribute to melasma and various pigmentary Issues. Pigmentation happens when specialised skin cells named melanocytes make excessive melanin — the purely natural pigment to blame for skin colour. This foundation makes it possible for subsequent correction treatments to work more proficiently https://sites.google.com/view/drnikitapatel/blog/why-does-skin-pigmentation-increase-in-summer