Why do I get dark brown age spots specifically on my upper chest and décolletage?

Why do I get dark brown age spots specifically on my upper chest and décolletage?

1. Introduction Dark brown age spots on the upper chest and décolletage develop primarily due to decades of cumulative ultraviolet radiation exposure on a region of skin that is remarkably thin and frequently unprotected by clothing. This chronic sun damage disrupts the normal function of melanocytes, causing them to permanently clump together and overproduce melanin … Read more