What is this white spot on my tooth?

Asked by Rayiscool (55) September 4th, 2007 from iPhone

I have had braces for 3 years now and a few weeks ago I noticed a white spot on my front tooth. It hasn’t gone away. Anyone know what it could be? or how to get rid of it? I searched around but couldn’t get a straight answer. Its whiter than the rest of the tooth.