i have like shiny circles on my arm whenever you reflect it in the light, you know where you have hair on your forearm and then it goes up and stops at a certein place on your arm? well im talking about there some on the circles are a bit raised and some of them are just shiny what is this could this be acne im 17 years old and i have acne on my face and my body but it looks different then what i see on my arm please help me out thanks