I had a steroid injection in my left knee on 6/12. Bruising at the injection site and across most of the knee was evident almost immediately. Within a few days, pain increased dramatically, making it nearly impossible to walk. The provider said this is “steroid flare”, and recommended 1000 mgs of Tylenol every 8 hours, and frequent icing for pain. This has lessened the pain somewhat, but the knee is still quite painful and feels unstable.