Too low blood sugar can lead to coma or even death. When there are low blood sugar manifestations such as hunger with pallor, panic, sweating, etc., it is recommended to replenish the sugar in time, and if it cannot be relieved or manifests itself directly as coma, it is recommended to seek medical treatment as soon as possible. Hypoglycemia is defined as blood glucose less than 2.8mmol/l, while hypoglycemia in diabetic patients is defined as blood glucose less than 3.9mmol/l. Hypoglycemia can be manifested as panic, shaking hands, fatigue, sweating, pallor, and in severe cases, can lead to the patient’s coma. Prolonged hypoglycemia can lead to irreversible brain cell damage. Increased sympathetic nerve activity during hypoglycemia can lead to increased heart rate and increased risk of cardiovascular disease. To avoid hypoglycemia, you should eat a regular diet, increase your carbohydrate intake before exercise, not exercise too much, carry candy with you, and for diabetic patients, you should increase your blood glucose monitoring and check your dosage before taking medication. Hypoglycemia can have serious effects on the body, should try to prevent the occurrence of hypoglycemia, when hypoglycemia occurs in a timely manner to replenish sugar, such as can not be relieved or coma, it is recommended to immediately seek medical attention, under the guidance of the doctor in a timely manner to avoid adverse consequences.