Can you help? I've read lots of comments on these fora about people feeling unwell when their blood sugars spike over 7 or 10mmol. What happens to you at those levels to make you feel unwell? I don't feel any different at 6 than I did at 11 though appreciate that I was conditioned to much higher and this may change over time. On the couple of occasions where I've felt peculiar ie slightly dizzy or rapid heart rate, my sugars have been fine.