KneeCortisone shot, is it common to have no pain then extreme pain for 16 hours & now hard to bend?

I have had one cortisone shot in each knee and never experienced a reaction either time. What puzzles me is the multiple shots of cortisone The way I understand it is
a shot then not another for at least six months as multiple shots can damage tissue.
Having said that the one shot in the really bad knee didn't work at all. I went another
route and had 4 shots of Orthovisc which is a viscosupplementation but this
doesn't work for everyone but is is helping me (thank goodness). Not cheap as my insurance co-pay for the med was $266.13. The med itself was over $1,300. for a course of 4 shots but unlike cortisone it can be repeated in about six months with no damage to the knee.
no additional damage to the knee.

This can happen sometimes. You did the right thing by taking an anti-inflammatory and icing the area down. I would recommend that you call your dr and let him/her know what happened, especially if you need to do another injection at some point. Occasionally you can have an allergic reaction to a preservative or inert ingredient in a cortisone injection. Rarely do you see allergic reactions to cortisone.

I have had several cortisone shots in my knee, and yes, this is a common reaction. Actually, I'm surprised that your doctor didn't tell you that. Both times I got the shots, my orthopedic doctor sent me home with a prescription for pain meds. I needed them, if I recall correctly (it's been over 20-25 years now) for almost a week. It might have been a few days less. I DO remember the pain though, that is for sure!!

You will feel better soon, and like I said, I haven't needed one for 20-25 years now, so maybe that fixed my problem!!

Best of luck to you!!