Any discoloration that persists unchanged for 7 years almost certainly is simply natural variation in pigment distribution in your skin, i.e. normal. Definitely not an STD. But if in doubt, see a dermatologist.
HHH, MD
you can see the image in the link
http://img266.echo.cx/img266/2153/image000094gt.jpg
you can see this link for a picture
http://img266.echo.cx/img266/2153/image000094gt.jpg
I make it a policy not to look at person's posted photos. It comes too close to practicing medicine from a distance. And as you can imagine, I am wary of downloading files from people I don't know. See a health care provider in person.
HHH, MD
Thank you doc. you just making me calm now.