Do I need a tetanus shot for a small cut about one centimeter long?

Generally, whether a 1-cm small wound requires a tetanus shot should be evaluated by a doctor. A tetanus vaccination is recommended if the wound is deep, heavily contaminated, or if the person's immunization history is inadequate. However, if the wound is superficial, clean, and the individual has sufficient immunity, a tetanus shot may not be necessary. If in doubt, it is advisable to consult a healthcare provider promptly. Specific details are as follows:

If the wound is deep (e.g., involving subcutaneous tissue), caused by rusty metal or dirt-contaminated objects, or if the person hasn't received a tetanus vaccine within the past 5–10 years, the doctor may assess a higher risk of infection. In such cases, timely administration of a tetanus shot is required to prevent infection by tetanus bacteria.

If the wound is superficial, affecting only the outer skin layer, caused by a clean object (such as a sterile blade), and the person has received a tetanus vaccine within the past 5 years with adequate remaining immunity, a tetanus shot is generally not needed—proper wound cleaning and disinfection are sufficient.

After an injury, immediately rinse the wound with water or saline solution, then disinfect with iodine solution. Avoid tightly bandaging the wound yourself; keep it well-ventilated. Seek medical attention promptly if signs such as redness, swelling, increased pain, or pus development occur.