A nail puncture wound is one that requires a tetanus antitoxin injection to prevent tetanus. Tetanus is needed because the nail puncture wound is deep and contaminated, making it susceptible to tetanus infection.
Clostridium tetani is an anaerobic bacterium that tends to survive in soil and rust, and will pass through the wound and multiply in an oxygen-poor environment, leading to tetanus. The main manifestation is going to be a manifestation of motor nervous system disinhibition, which means muscle stiffness and muscle spasms.
Because nails are relatively sharp and slender, and the surface is more contaminated, it is easy to cause a deeper wound when a nail is stuck, providing an anaerobic environment for Clostridium tetani to multiply rapidly, and then infecting the individual with tetanus. Therefore, an injection of tetanus antitoxin or tetanus immunoglobulin is required when a nail is stuck.