Picture Of Two Ringworms Together Do I Have Ringworm? (picture)?

Do I have ringworm? (picture)? - picture of two ringworms together

So I had these two lines, circles of light low on the left shoulder. after my return from Costa Rica, so I thought it was a strange thing, but I've been for almost two months. I want nothing, or Sting but know not what they are. Here is a picture:
http://s619.photobucket.com/albums/tt278 ...
Thank you very much