Some sort of rash neck top of shoulder. Not sore or itchy or red. More like raised skin bumpy very small spots. I have cold sore cold under nose?

Unsure. This can't be diagnosed with the information that is available. A history, physical examination & other studies may be needed to determine cause/causes. Once accurately assessed a treatment plan can be developed.
Rash. a rash needs in person evaluation to make right diagnosis and hence right guidance.