Local anesthesia when the anesthetic is not hit into the blood vessels, if hit into the blood vessels during anesthesia, may cause local hematoma, and rapid injection may cause toxic reactions, the patient is prone to dizziness, nausea, vomiting, irritability and other symptoms. In severe cases, muscle twitching and fainting may occur. General anesthesia, anesthesia is generally injected through the vein, hit the blood vessels to give the drug, but there will be instruments to observe the heart, pulse, blood pressure, and according to the patient’s weight and other basic conditions according to the amount of drug.