Epidermis thicker: On different parts of your body the top layer of your skin which is known as the epidermis is thicker or thinner. It is thicker on the thigh and that is why the derma roller doesn't penetrate.
Answered 4/1/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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