roseola―rose-rash
He has the measles.
I got a rash.
pityriasis in which an itchy rash develops over the trunk and extremities
What about the rash?
I got a rash.
a contagious disease that causes eruptions on the skin, called German measles
The rash is, um, also incredibly contagious.
{ecxema} on the skin caused by perspiration