how long does the lyme rash last
1 How long will a Lyme disease rash last? Usually 3-5 weeks: Erythema migraines, the bullseye rash associated with lyme, typically appears 7-10 days after a tick bite, though it can be from 1-33 days. It usually lasts 3-5 weeks, though could be shorter or longer. It tends to gradually expand over time.