Wounds under the nail shell generally do not need tetanus, but if the injury is iron or the wound is very deep, there is a certain risk of tetanus infection, you need to go to the hospital for tetanus injection, superficial wounds also need to do local care. It should be clear that tetanus bacillus can not grow in superficial wounds, if the wound under the fingernail shell is very superficial, generally do not need to inject tetanus, you need to disinfect the local area with iodophor alcohol, avoid touching water, and do a good job of local care. However, patients with iron injuries and deeper wounds need to prevent tetanus, and a skin test should be conducted before tetanus toxin injection to avoid allergic reactions. Daily wounds need to pay attention to, if there is a risk of tetanus infection need to consult a doctor in a timely manner, under the guidance of the doctor to carry out standardized treatment, to avoid the emergence of critical situations.