Sunlight -Did you know that dead skin cells can still absorb sunlight? However, the fact that they're not alive means that they will have a darker, "dead" appearance than healthy cells. Those dead skin cells look darker than your healthy, alive skin, hence the dark spots. The outer layer of skin grows thick and hard, and the dead skin cells build up. If there is a lot of friction in a certain part of your body, your skin will often grow extra thick to reduce the risk of damage to the sensitive lower layers of the dermis. ![]() ![]() Why is the heck the skin on your elbows, knees, and the backs of your ankles darker than the skin on your arms, legs, and feet? There are a surprising number of things that can cause the darker-than-normal skin:įriction - The human body is designed to adapt and protect itself.
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