Final answer:
The erythema migrans (EM) rash is associated with Lyme disease. It is a circular or oval-shaped red rash with a clear center, resembling a bullseye pattern.
Step-by-step explanation:
Erythema migrans (EM) rash is associated with Lyme disease. Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans through the bite of infected black-legged ticks.
One of the hallmark symptoms of Lyme disease is the development of a 'classic' erythema migrans rash at the site of a tick bite. This rash typically appears as a circular or oval-shaped red rash with a clear center, resembling a bullseye pattern.
Lyme disease is not associated with diabetes, psoriasis, or allergic reactions.