I have dark spots on both side of my face near the eyes. The weird thing is that when the temperature is low, it is barely visible. But when I m in a place where it is hot, humid or i m sweating, the dark spot becomes black and it looks as if am bruised. Also in the dark spot, there are black dots which looks like black heads, and I can feel the spots when I touch it. Can you tell me what it is and how to take care of it?