What Is The Cause Of Sore Throat And Itchy Bumps On Scalp?

Hi there, I am a 61 year old lady, about 25 lbs overweight, but eat pretty good, I d say. NO smoking or drinking or drugs, ever~! (except smoking in high school) and a bit in my 20 s. Anyway, 3 weeks ago I began to scratch the lower part of my scalp and tiny itchy bumps appeared. Eventually now they are all down my arms and on other parts of my legs, and a few lesions here and there. I do have a mild sore throat and have felt tired off and on, but have never had anything so wierd. Docs say it isn t scabies, or infectious but I am so sore, bleeding from scratching and thoroughly miserable.