How long might a tetanus shot make your arm sore?

Not long. The soreness should go away after a couple of days. If it has been more than 7 to 10 days, call your doctor to check it.

Related Questions

How long should a tetanus shot keep your arm sore?

Could be several day. Generally this is mild and does not last very long. If it persists past three days and is not improving, see your doctor. Read more...