Tetanus is an acute infectious disease caused by Clostridium tetani, common in deeper and contaminated wounds, the human body damage, serious respiratory failure, life-threatening. 2mm deep wound whether to play tetanus injection, usually not only according to the depth of the wound, but also need to be combined with whether there is serious pollution, infection and other aspects to comprehensive judgment: 1, no need to play tetanus: general 2mm or so deep wounds, such as only a sharp object scratches, wound trauma is small, and the injury site clean, no dirty contamination, especially not contaminated with rust, generally do not need to play tetanus injection, but the need to apply saline to the broken part of the rinse to ensure that the wound clean, and the application of iodine volts for local disinfection, but also pay attention to avoid premature wetting of the wound to reduce the risk of infection; 2, need to play tetanus: such as the wound is due to the presence of rust, or contamination of more obvious items of damage, damage to the wound is large, and not timely clean treatment of the case, there is a risk of infection, should promptly seek medical advice, wound debridement and disinfection, and follow medical advice to vaccinate tetanus injection, to avoid tetanus infection, resulting in serious adverse consequences. In summary, if a skin break occurs and cannot be handled by yourself, you should seek medical help and, if necessary, receive a tetanus shot for prevention to avoid damage to your health.