Effects of a tetanus shot

Vaccination activates the immune system, so tenderness, warmth, or swelling where the injection was given can occur. Some people feel tired or develop a mild fever or headache for a short time. These effects usually settle without specific treatment. A tetanus vaccine protects against tetanus, a serious illness caused when bacteria enter damaged skin; it does not treat every problem caused by the wound itself.

A stronger local reaction can make the arm uncomfortable to move. Tell a clinician if symptoms are worsening, lasting longer than expected, or interfering with normal activities.

Rest, drink fluids, and keep the injection area clean. Gentle movement may reduce stiffness. A cool cloth can ease local discomfort. Ask a pharmacist or clinician which pain or fever medicine is suitable for you, particularly if you are pregnant, have a long-term condition, or take regular medicines. Keep the wound-care instructions you were given and complete the recommended vaccination plan.

Seek emergency help for trouble breathing, swelling of the face or throat, widespread hives, fainting, or sudden severe dizziness after vaccination. Contact a clinician for rapidly expanding redness, severe pain, pus, or fever that may relate to the wound rather than the injection. The Tetanus Vaccination service can clarify the schedule and what protection is appropriate after an injury.

Ask which effects are expected, how to care for the injection site, when your next dose is due, and whether your wound needs additional treatment. Mention previous vaccine reactions, allergies, pregnancy, immune problems, and medicines before another dose.