When untreated, Lyme Disease is known to cause chronic diseases such as arthritis, neurologic symptoms and cardiac problems but is not known to be fatal. The rash may not develop for more than a month, if it ever does. A large percentage of cases apparently never develop a rash. Chronic disease symptoms may develop in people weeks, months or years later. The incubation period for Lyme Disease is considered to be three to 30 days.
Treatment usually consists of antibiotics such as doxycycline or amoxicillin.