Lowering sugar is the main theme in the treatment of diabetes. However, if hypoglycemia is produced by excessive glucose lowering, the patient will be very uncomfortable and even in danger of life. The main causes of hypoglycemia 1. overuse of glucose-lowering drugs; 2. failure to eat on time and in the right amount after using glucose-lowering drugs; 3. excessive exercise, etc. Performance: 1. The blood sugar concentration of normal people fluctuates between 3.5~8mmolML. Hypoglycemia is diagnosed when blood sugar <3.5mmol. 2. The initial manifestation is cold sweat, panic, tachycardia, tremor of the limbs, sleepiness and weakness. 3.Further development is drowsiness, loss of attention, blurred consciousness, loss of vision and movement coordination disorder, etc. At this time, patients can still take sugar to save themselves. 4.If it develops into severe hypoglycemia, coma, rigid spasm of limbs, squinting of eyes, dullness of senses, or psychotic-like attack, and if coma is aggravated, muscle retardation, shallow and slow breathing, bradycardia, loss of sensation, pupil narrowing and blood pressure drop will appear. Hazards: 1. Severe hypoglycemia or hypoglycemia lasting for too long can be life-threatening. 2. Hypoglycemia can also induce brain edema, brain atrophy, dementia, cardiac arrhythmia, myocardial infarction and lung infection and other complications. Self-help: After hypoglycemia occurs, self-help is very important. The patient's self-perception is more sensitive to the early detection of hypoglycemia, so diabetic patients must remember this mantra: panic, shortness of breath and cold sweat, weakness and confusion want to eat. Once three or more of these six symptoms appear at the same time, hypoglycemia may have occurred. At this time, it is advisable to chew 3 pieces of fruit candy immediately, generally the symptoms can be relieved after 15 minutes, such as more than 15 minutes still not relieved can chew 3 pieces of fruit candy again, at the same time to seek help from the doctor.