Whether or not you need tetanus for an iron cut yesterday that is growing today should depend on the condition of the wound. In the case of deep wounds, poor hygiene, wounds that are not too superficial but deeper or larger inside, and rusty iron scratches tetanus is required and is recommended to be given within 24 hours, preferably not more than 48 hours. However, if there is no bleeding from the wound, or if the wound is very superficial, or if tetanus antitoxin has been injected within 7 days, tetanus can be dispensed with. The wound should be disinfected, debrided, etc., and the dressing changed regularly. If there is any manifestation of infection, antibiotics such as amoxicillin and cefaclor are also needed to prevent infection. It is recommended that the patient go to the hospital as soon as possible, the doctor will determine whether the wound needs to be vaccinated with tetanus vaccine, so as not to miss the best time for vaccination.