Strong penetration. According to the information about lidocaine, it is known that lidocaine has strong penetrating power and can cause the death of mice. The time and effect of local anesthesia are related to the concentration of liquid medicine, which has no irritation to tissues and no obvious local vasodilation effect. Adding vasoconstrictors such as epinephrine can delay its absorption and prolong its action time. It can penetrate mucosa and can be used in various local anesthesia methods. Mainly used for conduction anesthesia and epidural anesthesia.