Alcohol can generally be used to disinfect superficial skin wounds, but because of its irritant properties, it is not suitable for all wounds, especially for the disinfection of broken skin and mucous membranes, and other disinfectants should be used. The concentration of alcohol commonly used for disinfection is generally 70% to 75%, and either too high or too low a concentration will have an effect on the disinfecting effect. Other commonly used disinfectants include benzalkonium bromide solution, povidone-iodine and hydrogen peroxide. 1. Benzalkonium bromide solution: also known as Xinjie Ermai solution, Levano solution, can be used for skin, mucous membrane wounds rinse, no irritation. 2. Povidone-iodine: it can be used for general disinfection of skin and mucous membranes because it is not irritating and has good disinfecting effect, which is more commonly used in clinics. However, people who are allergic to iodine should avoid using it. 3. Hydrogen peroxide: strong oxidizing ability, especially suitable for anaerobic bacteria infected wounds. After disinfection, it will produce a large number of air bubbles, which need to be rinsed out with saline. What kind of disinfectant to use in the clinic needs to be chosen by the doctor according to the specific situation.