Why Does Pigmentation Become Worse During Summer? Summer Is the season when many people notice dark patches, tanning, uneven skin tone, and dullness on their skin. The primary reason behind increased pigmentation during summer is excessive exposure to harmful sun rays. The skin increases melanin production in summer as a https://medium.com/@rameshjain5454/why-does-skin-pigmentation-increase-in-summer-599cc6b6d7c5