10 Side Effects of Flu Shots
Flu Shots Side Effect #6: Sore Shoulder
Flu shots are usually injected directly into the shoulder with the needle penetrating into the muscle. It causes microscopic tears deep into the muscle and this can leave you feeling quite sore for a few days afterwards. Despite the soreness, though, no lasting damage will be done and your shoulder will be as good as new again in a few days.
As brutal as it may sound, this method of tearing the muscle is very much by design. The intent is to cause an inflammatory immune system response that helps the shot to be effective in vaccinating the patient. Over the counter remedies are available if the pain caused is too uncomfortable.
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