In current clinical practice, some anesthetics are applied to the surface of the skin so as to achieve local anesthesia. Anesthesia is an important segment of current clinical practice, which refers to the application of drugs or other methods to make the patient temporarily lose sensation locally or as a whole, thus eliminating pain during surgical operations. Anesthesia is further divided into general anesthesia and local anesthesia. Certain local anesthetics with high penetrating power can be used to achieve anesthesia effect by dressing, such as lidocaine. For people who want to use anesthetics, it is recommended to use them under the guidance of a regular doctor, and before using anesthetics, they should carry out all kinds of life assessment, and only those who meet certain indexes are allowed to carry out anesthesia. And some anesthetics will have a certain degree of addiction, do not use without authorization.