Our diabetic bodies are just wierd. We have a fine balance between glucose and insulin. Usually the earlier I wake up the lower my reading. If I sleep in an hour or two my bg goes up as much as 20-30 points. If I don't eat something within 30 minutes of waking my bgs go up. If I go too long without food I will spike too. If I exercise more than 30 minutes I spike. So I plan my meals, snacks and exercise to try to avoid these spikes. Are you on any oral meds or insulin. I found taking metformin has helped me avoid many of these spikes. I take one 850 as soon as I wake up and another around 10:30 am. If I miss that 10:30 dose I will spike around 11-12:00. I take the last dose right before bed at night. The metformin works in the liver to stop the liver from converting stored glycogen into glucose. It is so much fun being a diabetic.