It'll last a few days, then it'll come down. We produce steroids when stressed: it starts a fight-or-flight chain of events in our body. There's stress and thus, a release of corticosteroids, so we'll either have to fight for our lives or run like heck, and for that, you need extra energy. So the release of steroids lets our liver know we need extra energy (= glucose) in a hurry. And it dumps glucose accordingly. Now, if we get a steroid shot, the liver reads that as the exact same signal, so it dumps glucose... And that can last a few days: it merrily keeps on dumping. Just keep testing and correcting, it'll get better soon...! Hope you'll feel better quickly!I had to have a trigger finger and a dodgy knee injected with steroids last Tuesday, and my blood sugars have gone very high! I'm T2 on insulin, so can compensate, but has anyone else found this, and how long do they take to return to normal? Thank you.