Muscle or Tendon?

Today I went to see a family practice doctor about my right arm. It was hurt sometime during the first full week of this month. Since then there's been a "stinging" or "burning" sensation whenever I extend the arm fully, especially when I do pull ups. I've stopped doing hard exercises with that arm -- and I'm trying to be good to it. Next Tuesday I'm scheduled for an "MRI of the upper arm to evaluate for a distal biceps or triceps tear."

I'm thankful for health insurance, and for the fact that it doesn't hurt when I drive.

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