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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Pain And Muscle Weakness In The Arm After A Flu Shot?

I had a flu shot 14 days ago (at a pharmacy). For the first time since I started getting the shot it was painful. my shoulder was very sore for 48 hours. Two weeks later I am having muscle weakness in my arm and pain when I lift my arm or reach across my body. Can this be a result of the shot being misplaced?
Mon, 16 Jan 2017
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Infectious Diseases Specialist,  's  Response
Hello!

You should know that usually the most common side effect of the flu shot is a reaction at the injection site, which is typically on the upper arm. After the shot is administered, you may have soreness, redness, warmth, and in some cases, slight swelling. These effects usually last less than two days. To help reduce discomfort, try taking some ibuprofen before getting your shot. But in your case two weeks after the shot, having these symptoms is unusually so I think you need a physical examination specially for muscle weakness by a neurologist to exclude a pathology.

I hope my answer help you. Let me know if I can assist you further. I wish you a quick recovery.

Regards,
Dr. Monika Dede
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What Causes Pain And Muscle Weakness In The Arm After A Flu Shot?

Hello! You should know that usually the most common side effect of the flu shot is a reaction at the injection site, which is typically on the upper arm. After the shot is administered, you may have soreness, redness, warmth, and in some cases, slight swelling. These effects usually last less than two days. To help reduce discomfort, try taking some ibuprofen before getting your shot. But in your case two weeks after the shot, having these symptoms is unusually so I think you need a physical examination specially for muscle weakness by a neurologist to exclude a pathology. I hope my answer help you. Let me know if I can assist you further. I wish you a quick recovery. Regards, Dr. Monika Dede