The danger of hypoglycemia: 1, diabetes is high blood sugar, the danger of hypoglycemia is very big, because the human brain energy supply needs glucose, and when hypoglycemia, the glucose content is low, it is bound to lead to brain dysfunction, and in serious cases can be coma. 2, when the blood sugar is too low, some hormones in the human body will react to raise blood sugar, the result is like shooting a basketball, the lower the blood sugar pressure. When it is very low, the lower the basketball is shot the higher it bounces. When the blood sugar is low, it will eventually cause a reflexive increase in blood sugar, which will also make the condition aggravated. 3, severe hypoglycemia can induce cardiovascular diseases, such as cardiac arrhythmia, that is, the heart beating randomly, and can also appear myocardial infarction, that is, heart infarction, and can also lead to cerebral ischemia after stroke. 4, long-term persistent hypoglycemia, it will cause neurological problems, and some People become like psychotic episodes, some are dementia, and some sustained hypoglycemia more than six hours later, what will appear? The patient is alive, but his mind is not clear.