How long does hot flashes last after having a cortisone?

I also have been experiencing hot all over body flashes,particularily the face and dizziness since my corizine shot in hip.Redness around the area of shot and heat on shot area .I had my shot 2 weeks a go.Pain in hip is now 50% better but hot flashes and dizziness and vertigo not worth it.Going to check my blood sugars tomorrow.i was relitively healthy until this shot.