Whether tetanus is needed after stepping on a nail is usually related to the severity of the wound and cannot be generalized. If the wound after stepping on a nail is superficial, for example, only the epidermis is punctured, there are no other symptoms, or even no bleeding, the wound will not be infected with tetanus, and it is recommended that edible alcohol or iodine povidone can be eliminated to deal with the wound, and there is no need to inject tetanus. After stepping on a nail if the wound is deeper and there are bleeding symptoms, tetanus antitoxin must be injected. At this time, Clostridium tetani can enter the body and easily grow and multiply in such a wound, which can lead to muscle spasms and is more lethal, so tetanus antitoxin must be injected. If tetanus antitoxin is injected at an early stage, it can neutralize the free tetanus toxin at the wound site and in the blood, and serve to prevent tetanus.