Scientific Studies counsel that heat by itself can activate melanocytes and add to melasma as well as other pigmentary Conditions. Pigmentation occurs when specialised skin cells called melanocytes produce excessive melanin — the pure pigment to blame for skin colour. Pigmentation did not build overnight, and it can't be erased https://www.reddit.com/r/Heathcliff/comments/1tpawpw/why_does_skin_pigmentation_increase_in_summer/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button