Anxiety rash?

I recently just started struggling with an anxiety disorder pretty bad. One night i was becoming extremely anxious and then noticed I had itchy bumps on my legs. I did not itch them but they started spreading all up and down my legs and then I was getting red spots apart from the bumps. Once I calmed down and felt somewhat better the bumps slowly went away. Could this be because I was having an anxiety attack or could it be from something else?