Ticks can carry several different diseases, Lyme, rocky mountain spotted fever, erhlichiosis, babesia, etc. If you have any ill feelings within a couple of weeks of being bitten by a tick, I'd get tested for ALL the diseases. They can all have long term side effects but if are treated early, you can avoid these. Flu like symtoms are the most common for all these diseases, achy, fever, vomiting, etc. If you have erhlichiosis, and they only test you for Lymes, the Lymes will come up negative and they will send you home saying nothing is wrong...