My arm hurts after the flu shot?

Vaccines: Typically after a vaccination you may have some soreness of the area. This is usually nothing to be worried about and will go away. If this continues to get worse, does not go away or gets extremely red/starts to have a discharge you should seek the advice of your doctor.

GOOD!!!!: That is a good thing! that means the shot is working! in fact, many shots have something called an adjuvant in them. An adjuvants job is only to dram more immune response to the site of the shot. Immune response = swelling, redness, pain and itching. The flu shot is the same. So, congrats, your shot worked! cellulitis after shots is rare, but if red extends past a joint or you have pus get checked.

Typical: This is a common complaint. My arm is usually sore for about three days. Warm compresses and tylenol (acetaminophen) can help.

Everyone has that: I think everyone has a soreness around the injection site which may feel worse the day after, but gets better quickly. The vaccine is injected directly into the muscle and irritates it temporarily and mildly. Many places offer an education sheet to keep for reference when vaccines are administered. It explains possible side effects and if there should concern about any of them.