A lupus rash usually causes red ... Measles is a viral infection that can cause a rash that begins on the face and behind the ears before moving to the rest of the body. Measles can be a severe ...

Discoid lupus condition causes a severe rash that tends to get worse when exposed ... It can even affect the ear canal. Some people experience itching, though that’s usually not the case.

A rash behind the ear may occur due to a variety of different medical conditions. Certain viral infections and autoimmune diseases may cause a rash behind the ear in both children and adults.