It has been there for a while now, possibly a couple of years, but has become more noticable in the past few months, possibly because the sun caught my face.
When I first noticed it,I thought it was hair dye as it starts at my hair line and then comes down about an inch on to my forhead, but it definatly isn't hairdye.
Does anyone know what it is, or if |I should get it looked at ??
It is completely flat by the way and not itchy or anything like that, just darker than the rest of my face.