Tetanus is a serious but preventable infection caused by a toxin from the bacterium Clostridium tetani. It enters through breaks in the skin and affects the nervous system, causing painful muscle stiffness and spasms. Good wound care and being up to date with tetanus-containing vaccines are the best ways to prevent it.

Key symptoms

• Lockjaw – the earliest and most common sign of tetanus. The jaw muscles become stiff and hard to open. A simple way to check is the three-finger test: normally you can fit three fingers vertically between your upper and lower teeth. If you cannot do this, your mouth opening is limited and this may be lockjaw.
• Painful and sudden muscle spasms of the back, abdomen, and limbs
• Difficulty swallowing, seizures, fever, sweating, blood pressure and heart rate changes

Most cases develop 3 to 21 days after injury, usually within 14 days.

⚠️ Health Tip: If your jaw feels stiff and you cannot fit three fingers in your mouth after a wound, this may be lockjaw. This finger test is only a quick screening tool, not a medical diagnosis – seek medical help right away.

How tetanus spreads

Tetanus is not contagious. It occurs when spores from soil, dust, or animal feces enter wounds. Deep or dirty wounds are high risk, but even small cuts can lead to tetanus if not cleaned properly.

First aid: what to do after a cut, scrape, or bite

1. Wash the wound right away with soap and running water

2. Remove dirt or foreign material gently

3. Do not rely on antibiotics to prevent tetanus

4. Check your vaccine history and update if needed

5. Seek medical care if the wound is deep, dirty, or if you are unsure of your last vaccination

Animal bites are considered tetanus-prone wounds in the Philippines and vaccination must be checked.

Tetanus vaccination in the Philippines

Tetanus protection comes from vaccines that include tetanus toxoid such as DTaP, DT, Td, or Tdap.

Children

In the Philippines, tetanus is included in the Pentavalent (5-in-1) vaccine given at 6, 10, and 14 weeks of age. This covers DPT-HepB-Hib.
In some private clinics, a Hexavalent (6-in-1) vaccine is available, which also includes polio (DPT-HepB-Hib-Polio).
At 12 to 15 months, children receive a booster with DTaP that continues tetanus protection.
Another booster with Td is recommended during adolescence, usually at 12 to 15 years of age.

Adults

If you have already completed five properly spaced doses of tetanus-toxoid–containing vaccines in your lifetime, you are considered to have long-term or lifetime protection.
Routine boosters every 10 years are not strictly required once you have completed all 5 doses.
However, in certain situations such as deep or dirty wounds, or if vaccination history is uncertain, doctors may still give a booster dose or recommend tetanus immune globulin (TIG) as extra precaution.

Pregnancy

One Tdap dose is recommended between 27 and 36 weeks of pregnancy. This protects both mother and newborn from tetanus and pertussis.

Maternal and neonatal protection

Immunizing women of reproductive age and practicing clean delivery and cord care are important strategies to prevent maternal and neonatal tetanus.

Tetanus immune globulin (TIG)

TIG may be used to prevent or treat tetanus by neutralizing the toxin. It is given to people with dirty or major wounds if they are not fully immunized or if vaccination history is unknown.

When to see a doctor

• Deep or dirty wounds, crush injuries, or wounds with dead tissue
• Animal or human bites
• If you cannot remember your last tetanus shot
• If you notice jaw stiffness, muscle spasms, or trouble swallowing

Doctors may clean and remove dead tissue, give a booster dose, provide TIG if indicated, and manage complications in severe cases.

FAQs

Is tetanus contagious?
No, tetanus cannot spread from person to person.

If I had a tetanus shot years ago, am I still protected?
Protection decreases with time. Adults usually get boosters every 10 years, but if you already completed 5 lifetime doses, you have long-term protection and only need extra doses if exposed to risky wounds.

Do antibiotics prevent tetanus?
No. Wound care and vaccination are the only effective ways to prevent tetanus.

Do I have lifetime protection if I completed 5 TT doses?
Yes. Completing five properly spaced doses of tetanus-toxoid–containing vaccines gives long-term, often lifetime protection. This is the standard used for maternal and neonatal tetanus prevention. Doctors may still recommend a booster in special cases like dirty wounds or when your vaccination record is unclear.

Is the finger test a reliable way to detect lockjaw?
The two- to three-finger test is a quick and practical way to notice limited mouth opening. Normally, you can fit three fingers between your teeth. If you cannot, this may be trismus or lockjaw. But it is only a screening tool – a healthcare professional should confirm the diagnosis.