My shoulder has hurt for a long time and yesterday I went and had a cortisone injection. Later that day I began to feel really awful but I didn't know what was wrong. Finally I figured it had affected my blood sugar. I should have left work but I didn't. When I got home I tested and my BG was 220 without eating anything. It kept bouncing around all night between 140 and 220 and I didn't sleep at all. Today I still feel awful but morning BG was 114 and I still haven't eaten anything today. I don't take medicine so I didn't know what else I could do. I think I will eat only protein and salad today.