Why do my old white surgical scars turn dark brown after being in the hot summer sun?
1. Introduction Old white surgical scars turn dark brown in the summer sun because the disorganized connective tissue of a scar is structurally distinct from normal skin and reacts unpredictably to ultraviolet radiation. The melanocytes surrounding and within the scar tissue can become hyper-reactive to sunlight, aggressively overproducing melanin in a misguided attempt to protect … Read more