The key is to assess the severity of the finger cut. If it's just a superficial skin scratch, then the wound is shallow, and it only requires disinfection with agents like iodophor or alcohol; there's no need for a tetanus shot. Conversely, if the cut on the finger is deep, such as reaching the subcutaneous fat or, in severe cases, the muscle layer, such deep wounds can easily lead to the growth and reproduction of tetanus bacillus, producing toxins and causing clinical symptoms in patients. Therefore, in such cases, it is recommended that patients go to the hospital to receive a tetanus antitoxin injection.