A bump.

[pedrobehr]

So, these past months I've noticed something on the left side of my left leg. It is about 6-8 inches above my ankle.

When I do anything that exercises my legs, it enlarges (but doesn't change colors). The picture below shows how big and noticeable it gets. When I rest, it disappears, and the area becomes flat again.
http://i284.photobucket.com/albums/ll5/Chocobolifee/Untitled11.png
When I poke it, it hurts a little (depends on the exercise).

Does anyone know what it is, and what I can do about it?

My friends says that it formed because I was wearing my Van's Half Cabs.

[Quahog]

I would go to a doctor. You probably hurt yourself exercising or doing some sports. That formed. It's either a bruise, or a tumor or sort.

[ackmedsgirl666]

Could be a bump filled with fluid bur I would definitely go to. Doctor and get it checked out invade it's something serious

[Syvelocin]

Sounds like a cyst honestly. I would get it checked out, but unless the pain isn't that bad I wouldn't be too concerned. If it hurts more, you might want to look into getting it removed (if it is a cyst anyway) but the surgery isn't worth it if it isn't that bad.