Strange sensation…

Patient: Have been having a sensation in my right arm, shoulder and upper back area,and armpit on right side.Sensation is that of what would feel like a rugburn, or a scrape, without actually having one.Also noticed 3 raised red spots on right arm in the muscle area.Any idea what is going on?Can’t afford to go to an urgent care ot walk-in clinic right now.Thanks for your time

Doctor:

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