About a month ago i developed a rash (located on the inside on my left ankle) that is a distinct bullseye shape that is red and raised and about an inch and a half around. Its not itchy, no pain, and its not spreading or growing. I went to the doctor a week ago and was treated for ring worm but have had no changes. Ive been reading about lyme disease but have had no symptoms of that. I believe its some kind of insect/spider bite but not 100% positive. I believe this because I was working on a ranch in TN May 2011 to late June 2011, wearing jeans, long socks, and cowboy boots everyday during that time and never noticed any ticks on me. I was staying in a barn at the time that was not well insulated and had many bugs and spiders that could easily get into my room while i slept.
Please help!