Symptoms of Lyme disease may have a delayed onset and can fluctuate. The most obvious sign of Lyme disease is an erythema migrans (EM) rash, often referred to as a bull’s-eye rash. This is diagnostic ...

Conditions like vasculitic urticaria, erythema multiforme, and urticaria pigmentosa mimic urticaria but differ in etiology and treatment. Accurate diagnosis requires distinguishing urticaria from ...

The most obvious sign of Lyme disease is an erythema migrans (EM) rash, often referred to as a bull’s-eye rash. This is diagnostic of the infection and treatment should be started straight away ...