I'm having the same problem as the user who posted this blog. 2 nights ago, for dinner I only had a salad with chicken and a few chocolates thereafter (Christmas...). My blood sugars were 20 which I was really shocked by. I corrected etc and went to bed later. I woke up feeling really really sick, blood sugars were 22. I was worried n confused n knew I was going to vomit as a result but took insulin first to try and prevent this. I vomited quite violently and felt better. 4 hours later, Blood sugars were still 20 so I changed my insulin(from the fridge) and blood sugars went back down. However, same thing is happening this morning. Blood sugars 20,took insulin, 45 mins later they're at 19! Is my kidney failing? Is there something really wrong with me? I'm not ill.