I have a red raised rash from a recent tick bite, could this be lyme?

Tick bite: If the swelling is in and around the bite site, it's just the body'd reaction to the bite. If the tick was big, there's no need to worry. If it was a deer tick which is tiny, there maybe some need for concern becuase of lyme disease. Please look at the picture of the classic bulls-eye rash of lyme - this occurs within 7-10 days after the bite.

Yes: Many disesases are spread by tick bites. The lyme disease rash of erythema migrans typically causes a large "bulls eye" or annular rash at the bite site. Southern tick associated rash illness has a similar rash but its smaller and commonly on the trunk. You can also get a bacterial superinfection of a tick bite. See your doctor for proper diagnosis and treatment.

Yes, it could be Lym: Lyme can present with a red rash called erythema chronicum migrans.

Not just Lyme: Avoid being "lyme-centric"! depending on geography, there are several other tick borne diseases ( e.g. Anaplasmosis, babesia, human monocytic or granulocytic erlichiosis) that co-infects with lyme (caused by b. Burgdorferi)or else , the diagnosis is something other than lyme (eg. Relapsing fever caused by b. Hermsii & southern tick -associated rash illness [stari] caused by a diffferent tick).