“Fortunately, blue light is not associated with skin cancers, but it has been shown to lead to premature aging and the development of dark spots,” Zeichner says. Blue light can also break down ...

Mongolian blue spots happen when pigment cells make melanin under the skin’s surface. The reason the spots are blue is because of something called the Tyndall effect. The Tyndall effect involves ...

Deep color changes may appear blue or gray, though a spot may also be a much darker brown than a person’s natural skin color. Also called sunspots, solar lentigines, or liver spots, people can ...

Blue light has shorter wavelengths (around 400-500nm, as mentioned) compared to red light, which ranges from 620 to 750 nm. (Green light, which is also sometimes used for skin, falls somewhere in ...

But while it’s easy to assume the worst, it’s important to remember that there are a lot of types of spots on skin that can surface. For the record, many of these spots, including red dots on ...