Wounds within the fingernails generally do not require tetanus shots, but they do when the wounds are caused by iron products and other factors. A tetanus shot reduces the probability of the toxin binding to the nerve tissue, thus preventing tetanus. Wounds within the fingernails can be caused by factors such as trauma and nail fungus. Usually, tetanus shots are not required. If the patient is due to iron products after piercing, caused by the wound within the nail when, due to the tetanus bacillus in the iron surface of the low activity, and the wound belongs to the anaerobic environment, tetanus bacillus once into the anaerobic environment when, can lead to tetanus. Therefore, once the nail surface is pierced by iron products, tetanus is required. When there is a wound in the nail, it is recommended to clarify the cause of the disease in time and choose the appropriate guidance method according to the actual situation under the guidance of the doctor.