A member asked:

Whenever i get an intermuscular injection or a vaccine/pneumonia shot in my upper arm, it hurts for days. why is that?

A doctor has provided 1 answer

Normal immune system: Pain at the site of an immunologic injection (vaccine) is usually showing that your immune system is working well and the vaccine is having its desired result. Other times it can be simply from a deep bruise. Both respond to Acetaminophen and cold compresses initially, but warm compresses may make the pain feel better after the first 24 hours.

Answered 10/31/2020

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