Erythema migrans (EM) or “bull’s-eye” rash at bite site.
Less than 50% of people bitten by a deer tick develop the classic bull’s eye (EM) rash. 1
Some develop no rash at all, others have rashes that are different. Image typical EM Rash. Image courtsey of Ed Masters
1 R. Smith et al Annals of Internal Medicine 2002;421:421-428, 477-479;
A. Pachner Reviews of Infectious Diseases-Vol. II, supplement 6 – September-October 1989 Neurologic Manifestations of Lyme Disease, the new “Great Imitator;
B.J.M. Johnson, Ph.D., Chief, Public Health, NPS Ticks and Disease