hello, i know this is sexual health but the skin care section wasnt really active. i have no idea what these things at the back of my leg are. it started off with a little rash, nothing that hurt, they were hard little spots no fluid inside then they left these black scars just above my calf, on the fold. they were itchy before when it was a rash but now it just looks a little scaly. any idea on what it could be?