Hypoglycemia occurs in normal people due to insufficient sugar intake due to excessive hunger, or excessive sugar consumption due to excessive exercise, or use of medication. Hypoglycemia refers to low glucose level in plasma, and the clinical symptoms are palpitations, profuse sweating, trembling, cold limbs, hunger and even coma. The main reasons for hypoglycemia in normal people are not eating on time, excessive hunger resulting in less sugar absorbed into the blood to meet the body’s consumption. Or not replenishing sugar in time after strenuous exercise. Hypoglycemia may also occur with heavy alcohol abuse. In addition, drugs such as sulfonylureas and quinolones may cause hypoglycemia. Repeated hypoglycemia symptoms even after eliminating the above conditions should be alerted to related diseases. Prompt medical attention is recommended in case of hypoglycemia.