The side effects of anesthetics are relatively large, in general, anesthetics are divided into two categories, one is general anesthetics, the other is local anesthetics. General anesthetics is the role of paralysis of the central nervous system, the use of more will cause serious inhibition of the central nervous system, resulting in delayed awakening, hypoxia, respiratory and circulatory depression, a drop in blood pressure and other side effects, serious respiratory and circulatory depression, resulting in death. Local anesthetics act on the peripheral nerves, and too much of it may also inhibit the central nervous system, resulting in a drop in blood pressure, slowed heart rate and respiration, nausea, vomiting and other symptoms, and in severe cases, poisoning leading to death. Therefore, when doing surgery, it is necessary to maintain a high degree of vigilance, according to the site of surgery and the weight of the patient, strictly control the amount of anesthetic use, absolutely no overdose of anesthetics to avoid side effects.