Is there side effects from a flu shot?

Yes, but unless you: Have a specific allergy or another reason to avoid it, you should get the shot. Every medical procedure has side effects.

Potentially: Flu shot side effects may include: slight swelling, redness or pain at vaccination site. If headache, nausea, fever or muscular pain occur they usually resolve within one to two days. You won't get the flu from a flu shot because the virus either contains inactivated virus or doesn't have virus particles in it. Severe side effects are rare.