Recently I had Lyme disease and had perhaps the most stereotypical bull's eye rash ever. All medical people I met wanted to see it, and called their friends/coworkers over, took pictures, etc. But the rash still has me confused about the biology of it. The shape itself doesn't seem to make biological sense to me; why is there a white ring that is unaffected by whatever bacteria is there? Why does the rash occur at a different place than the tick bite? Thanks for your help!