What is the danger of a low blood glucose level? A Low blood glucose level is extremely dangerous. It can cause confusion, dizziness, altered mental status, and even fainting, all of which can lead to serious harm to the person. Hypoglycemia (as it is called) is the opposite of Diabetes. With diabetes the low blood glucose range is about the same as a normal person average glucose levels, meaning the glucose levels are extremely high (and this is dangerous in the long run). However with hypoglycemia the low blood glucose level is extremely low. This…