Clove oil is one of the most effective natural remedies for toothache, and it has real science behind it. Its active compound, eugenol, works as a local anesthetic by stabilizing nerve membranes and blocking pain signals. In a clinical trial of 73 adults, a clove gel performed just as well as 20% benzocaine (the standard over-the-counter numbing agent) at reducing pain from needle sticks in the gums, with no significant difference in pain scores between the two.
That said, clove oil is a potent substance that can cause chemical burns if used improperly. Here’s what you need to know to use it safely and effectively.
How Clove Oil Numbs Pain
Eugenol, which makes up the bulk of clove oil’s active chemistry, works similarly to a local anesthetic. At low concentrations, it reversibly blocks nerve impulses by stabilizing the nerve cell membrane and raising the threshold needed to trigger a pain signal. Think of it as turning down the volume on the nerve so it stops firing.
Beyond numbing, clove oil also reduces inflammation. It inhibits the production of prostaglandins, the same chemical messengers that ibuprofen targets. This dual action, numbing the nerve while calming inflammation around it, is why clove oil often provides more noticeable relief than other home remedies. Dentists have used eugenol-based preparations for over a century, and it remains a common ingredient in professional dental cements and temporary fillings.
How It Compares to Benzocaine
In the study mentioned above, researchers at a university dental clinic applied either a homemade clove gel, a 20% benzocaine gel, or a placebo to the gum tissue of volunteers. After five minutes, participants received two needle sticks, and their pain was measured on a standard 100-point scale. Both clove and benzocaine produced significantly lower pain scores than the placebos, and neither outperformed the other. The researchers concluded that clove gel could potentially replace benzocaine as a topical numbing agent before dental injections.
This matters for people who want to avoid benzocaine, whether due to allergies, sensitivity, or simply preferring a natural option. Clove oil won’t match prescription-strength painkillers for severe dental infections, but for surface-level gum pain or a toothache you’re managing until a dental appointment, it’s a legitimate option.
It Also Fights Oral Bacteria
Clove oil doesn’t just mask pain. Lab studies show it kills or inhibits several of the bacteria most responsible for tooth decay and gum disease, including Streptococcus mutans (the primary cavity-causing bacterium) and Porphyromonas gingivalis (a major driver of gum disease). The minimum concentrations needed to inhibit these bacteria were quite low, ranging from 0.1 to 0.8 mg/mL depending on the strain.
This antibacterial activity can help keep an infected or damaged area cleaner while you wait for professional treatment. It won’t cure an abscess or reverse decay, but it adds a layer of protection that most other pain remedies don’t offer.
How to Apply It Safely
Undiluted clove oil is too strong for direct application to soft tissue. Case reports document patients developing oral mucosal burns after applying concentrated clove oil, with symptoms including shallow ulcers across the cheeks, tongue, and palate, along with crusting and peeling of the lips. These injuries are painful and can take weeks to heal.
To avoid this, always dilute clove oil before use:
- Standard dilution: Mix 3 to 5 drops of clove oil into 1 teaspoon of a neutral carrier oil like olive oil, coconut oil, or sweet almond oil.
- For a specific tooth: Dip a cotton ball or swab into the diluted mixture and hold it against the gum tissue near the painful tooth for a few minutes. Apply to the gums, not directly into a cavity or broken tooth.
- For broader mouth pain: Mix a few drops of clove oil into a teaspoon of coconut oil and gently swish it around your mouth, then spit it out.
Never swallow clove oil. Reapply every two to three hours as needed, but treat this as a short-term solution while you arrange dental care.
Risks of Overuse and Ingestion
Eugenol is safe in small, diluted, topical amounts. Ingesting it is a different story. According to MedlinePlus, as little as 10 milliliters (about two teaspoons) of eugenol oil in adults can cause serious effects, including seizures, liver failure, rapid heartbeat, and difficulty breathing. In children, the toxic threshold is even lower.
Even without swallowing it, excessive topical use can irritate or damage gum tissue over time. If you find yourself reapplying constantly for more than a day or two, the underlying problem needs professional attention. Clove oil is a bridge, not a treatment plan.
Children and Clove Oil
Clove oil should not be used on babies or toddlers. Most medical professionals advise against putting any essential oil, even diluted, inside a baby’s mouth or on their skin. Clove oil specifically should not be used on children under 2 years old and should never be ingested at any age. For teething pain in infants, chilled teething rings and gentle gum massage with a clean finger are safer alternatives.
For older children, the same dilution guidelines apply as for adults, but use the lower end of the range (closer to 2 or 3 drops per teaspoon of carrier oil) and supervise them closely to make sure they don’t swallow it.