What is wrong with my left side?

Now this was annoying. At the mud festival one of the interns was tossed into me, and that definitely hurt my neck a lot (more on the left side). Since then both a canker and a stye on the left side (if you don't know what these are, be glad!) Can I replace this side? Now if the left side of your brain stands for the logical side, what is that implying? That the logic is broken in Korea?