3 ms·
You ever gotten a flu shot? Usually your arm hurts for a day or two after, even if there are no other symptoms. This is a side effect of the immune response, as
by garmaine 6y ago
You ever gotten a flu shot? Usually your arm hurts for a day or two after, even if there are no other symptoms. This is a side effect of the immune response, as your body fights the "infection" at the point of injection.
- comfydragon 6y agoAnd here I've thought the sore arm was your body reacting to a hypodermic needle going into your upper arm muscles. I suppose it could be a little of both though?