Allergic reaction

I developed an allergic reaction on my shoulders/upper back last night. The irritation was so unbearable that I hardly slept. The rash was spreading to my side and arms. I left work early today and went to Patient First. The doctor said right away that I had an allergic reaction that was now in my bloodstream. He wasn't sure what caused it but prescribed steroids and a strong anthistimane. Please pray that the medicine works quickly!

My shoulders/upper back

My left arm