酒精消毒，伤口越疼越有效？

Core Viewpoint - The claim that "the more painful alcohol treatment is, the more effective it is" lacks scientific basis, as pain is a result of alcohol's chemical irritation rather than its disinfecting efficacy [2][3]. Disinfection Mechanism - Alcohol is a traditional disinfectant that effectively kills various microorganisms, but the pain experienced during application is due to its irritative effects on nerve endings and tissue dehydration [2]. - The effectiveness of alcohol disinfection is influenced by factors such as concentration, contact time, type of microorganisms, and cleanliness of the wound [3]. Alcohol Concentration - The optimal concentration for disinfection is between 70% and 80%, with 75% being commonly used; concentrations that are too low or too high can hinder disinfection effectiveness [3]. Cleaning Procedures - Prior to using alcohol for disinfection, it is essential to clean the wound with running water and soap to remove visible dirt, as contaminants can obstruct alcohol's contact with pathogens [3]. Alternative Disinfectants - For superficial wounds with minimal bleeding, iodine-based disinfectants are recommended due to their broad-spectrum efficacy and lower irritation compared to alcohol [4][5]. - In cases of deeper wounds, medical attention is advised to assess the depth, presence of foreign objects, and bleeding [5].