What are Pigmented Lesions?
Melanin generated in the melanocytes is an important factor that determines skin color in humans. It plays a role in protecting the skin against UV rays. If melanin cells are exposed to strong UV rays over a long period time, more melanin is generated to protect the skin. If excessive melanin pigmentation builds up, pigmented lesions such as freckles, melasma or blemishes may appear. Pigmented lesions can occur for a variety of causes such as aging, heredity, hormones, stress, temperature changes, lack of sleep or UV rays.