2 Answers

Flu is known to cause body aches and pains, talk with your doctor about your concerns.

I'm so sorry you have the flu!  The flu has been known to make people ache everywhere-  Sometimes when you cough really hard- over and over all of your muscles tighten- Including in your neck...if your neck is in an odd position it can cause your muscles to tighten on a nerve(s)...this can cause shoulder and arm pain.  Your shoulders tighten and so do your arms- and they stay tightened until the coughing spell is over and you relax.  Sometimes keeping muscles tight (that aren't used to it) causes muscle pain.  Speak to your doctor- and when you do, ask when the cough should be easing up...because pneumonia can occur.  

I hope you feel better very soon!