Lyme Disease

Lyme Disease: Small percentage of patients get classic bullseye rash

June 08, 2018 - 3:30 am
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KYW’s Medical Reports Sponsored By Independence Blue Cross. 

By Dr. Brian McDonough, Medical Editor

PHILADELPHIA (KYW Newsradio) -- The classic rash of Lyme disease is called erythema migrans. This is the classic bullseye rash that is discussed on a regular basis and virtually every medical student knows what to look for. However, it is important to know that approximately 50% of patients may get a rash with Lyme disease, but only 9% get the classic bullseye rash. 

The erythema migrans rash may appear on other places on your body than the bite site. In most cases, it begins as a single circular red mark that spreads outwards. The rash often becomes lighter in the area nearer to the center of the bite. This central clearing is what distinguishes a bullseye rash from other rashes. 

In people of color, the rash may appear more like a bruise.