Hypoglycaemia, or hypo, is the medical term for low blood glucose levels – that is a blood glucose level of less than 4 mmol/l. This is too low to provide enough energy for your body’s activities. Hypos can happen when you are treated with insulin or some diabetes tablets. No matter how much you know about diabetes or how careful you are, if your diabetes is treated with certain medication, you are likely to experience some hypos. If you have Type 2 diabetes and your diabetes is not treated with certain tablets or insulin, you will not have a hypo.