hi i noticed a few days ago that i have an almost-perfect, bruise like circle on the inside of my calf. it is not a bruise and i dont think its ringworm because there is no texture to it and feels just like my normal skin and there are no bite marks or broken skin. its not purple or anything its all one shade of a dark redish colour and looks as if someone drew it on with makeup or something. the very middle feels like there is a slight bump deeper under the skin and hurts a bit when i apply pressure... any ideas?