Can a scratch lead to tetanus?

Tetanus is caused by a toxin made by bacteria that can enter damaged skin. The concern is greater with a deep puncture, crushed tissue, soil, saliva, or a wound that is difficult to clean. A superficial, clean scratch is generally assessed differently from a deep or contaminated injury. Tetanus does not spread from person to person, so the key questions are the wound's condition and your immunisation history.

Rinse the area under running water and wash it with soap. Remove visible dirt only if it comes away easily, and avoid putting harsh chemicals deep into the wound. Cover it with a clean dressing if clothing or friction may irritate it. Arrange a medical review if the wound is deep, dirty, caused by an animal, or you cannot recall your tetanus doses. A clinician may recommend a booster or additional treatment based on the injury and your records.

Get prompt medical attention for a deep wound, a puncture, embedded material, spreading redness, warmth, swelling, pus, fever, or increasing pain. Emergency care is needed for heavy bleeding, loss of movement, numbness, or an injury near an eye. Seek urgent advice if you develop jaw stiffness, difficulty swallowing, painful muscle tightening, or breathing difficulty; these can be signs of serious tetanus illness.

Ask whether the scratch is clean or contaminated, whether your vaccination record provides enough protection, and whether the wound needs antibiotics or a tetanus booster. Mention when the injury occurred, what caused it, whether the skin bled, and any previous reaction to vaccines.