Superficial wounds are less likely to be infected by tetanus and deeper wounds are more likely to be infected. Tetanus infection is caused by infection with Clostridium tetani, which is an anaerobic bacterium that cannot reproduce in an aerobic environment. Clostridium tetani often parasitizes rusty iron, dirt, and enters the body through wounds in the skin, and can only survive in an anaerobic environment. Generally, superficial skin wounds do not create an anaerobic environment and have little chance of being infected with Clostridium tetani. Deeper wounds that have not been properly debrided may develop an anaerobic environment and have a greater chance of becoming infected with Clostridium tetani. Localized wounds, especially stab wounds, nail wounds, needlestick wounds and other wounds with deeper wounds, should seek medical attention in a timely manner, debridement treatment, keep the wounds sterile, and injection of tetanus antitoxin, which can play a better role in the prevention of tetanus.