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I'm sorry to hear about your symptoms.
Now this sort of pain can be due to a number of conditions. However in order to help in you in a better manner, can you give me a little more information? Do you have any numbness, tingling or burning in the arm? any weakness in the arm? Can you elaborate how does the arm feel strange? Any other medical conditions or medications that you might be on?
This is an information request ONLY, NOT an answer.