If you're on lantus only, then it may be you need to adjust your dosage if you're getting hypos. I also have problems with hypos and hypers when I'm sick with infections or anything else on top of my usual. Pain level also seems to make my sugar levels go crazy at times. So I've had to adjust lantus a fair bit. I still don't think I've got my basal right.... every time I get it just right my body does something to change it and I have to start again. My endo recommended though that dropping lantus should be done by 2 units at a time... so drop 2 units and wait 3 days to see if it improves or not and keep going with that until you find the right dosage that stops your hypos. Also I agree with others about watching the carbs... maybe you don't eat much carbs and your dosage is too high for what you eat as well. Physical activity also can contribute to hypos.