What is the eruption ... (With photographs)?

The most popular images eruption in product development: question Scarling : What is it? Rash ... (With pictures) So for almost a week now, I raised the question, bumps on the skin really little color on the back of my neck began and grew to this point, and spread so far behind my ears, my upper back , shoulders and upper arms! It looks a lot like acne or heat rash. First, it has not been read or itchy, but suddenly it became so itchy he does is of course also in red. I am worried, simply

Itching Urticarial Rash