What to Do If Your Flu Shot Causes Arm Soreness
Arm soreness after a flu shot is common and temporary, caused by the body's inflammatory response as it builds immunity. To alleviate discomfort, apply a cold compress, consider OTC pain relievers (avoiding preemptive use), and rest. The minor soreness is a small price to pay for the protection against serious flu complications, and if severe allergic reactions occur, seek medical help immediately.