Clove Oil and Toothache: The Evidence and the Risks
Toothache is not a condition, it is a symptom, and most pages about clove oil for toothache skip that. We sell clove bud oil and clove leaf oil for aroma and cosmetic use, labelled never for internal use, so this page does not contain a method, a dilution or a drop count for a painful tooth. What it does contain is the order of questions a dentist would ask, what the clove studies did and did not show, and the harms that are on record.
Clove Essential Oil
Our own Clove Essential Oil, in sizes from 0.5 oz to bulk.
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Shop Now →First question: is this an emergency?
The NHS says to go to A&E if swelling around the eye or neck, or swelling in the mouth or neck, makes it hard to breathe, swallow or speak, and not to drive yourself there. It lists a swollen cheek or jaw, a high temperature, red gums, a bad taste or pain on biting as reasons to book a dentist, and says to book one if the ache lasts more than 2 days or does not ease with painkillers (NHS, Toothache). Scottish clinical guidance for acute dental problems adds that limited mouth opening or facial swelling signals spreading infection (SDCEP, Management of Acute Dental Problems, 2nd ed.). If any of that is you, stop reading and call.
Second question: what is the cause?
The NHS names tooth decay, a dental abscess, a cracked or damaged tooth, a loose or broken filling, infection around a partly erupted wisdom tooth, gum disease and teeth grinding. These need different dental care. A bottle of oil is the same for all of them, which is the core problem with a do-it-yourself approach.
The FDA record shows how much that matters even for a dental-grade product. In 1982 an advisory Dental Panel backed eugenol for toothache, but only for throbbing, persistent pain, which it took to mean a tooth with irreversible pulp damage. It said intermittent pain means the pulp is still viable, and that an irritating agent could make that worse and cause the tooth to die. The Panel described eugenol as very caustic. In 1991 FDA went further and moved eugenol to Category III (data insufficient), saying it can damage viable pulp (FDA, Federal Register, 24 September 1991, 56 FR 48302). Reasoning from that, the practical consequence is that the people most in favour of eugenol for toothache still wanted the pain pattern sorted first, which is a judgment a dentist makes with an X-ray and a probe, not something you can settle from a kitchen shelf.
A current US eugenol toothache product label shows the same boundaries: 85 percent eugenol, labelled only for throbbing toothache due to a cavity, "Visit Dentist within 48 hours of use," allergy alert for anyone allergic to eugenol (clove oil) (NLM DailyMed label). Our bud oil is 73.57% eugenol by our own published GC-MS report, so it is in the same strength class but has none of those labelled limits.
What the clove research actually covers
- One small trial, not on a toothache. Alqareer and colleagues randomised 73 adults to a homemade clove gel, 20% benzocaine gel or placebos on healthy cheek-side mucosa before needle sticks. Both active gels beat placebo (p=0.005) with no difference between them, and the authors wrote that clove "might possess a potential" to replace benzocaine (Alqareer et al., Journal of Dentistry, 2006). Needle-stick discomfort in healthy tissue is a different problem from a throbbing tooth. See clove oil vs benzocaine for that comparison.
- A systematic review that cannot be applied to a bottle. A 2025 review of 21 studies lists clove oil (eugenol) among the most promising plant agents for dental pain, but its abstract reports no effect sizes and ends by asking for standardised preparations, larger trials, and data on dosing and long-term safety (Reddy et al., International Journal of Dentistry, 2025).
Our verdict: the evidence is real but small, it uses preparations that vary, and none of it is on an aromatic oil from a shop shelf. We will not stretch it to cover our bottles.
What clinicians recommend instead
The ADA's living guideline recommends NSAIDs such as ibuprofen and naproxen, alone or with acetaminophen, for toothache in adults and adolescents 12 and older when dental care is not immediately available (ADA living guideline, last evidence search July 2026). The NHS recommends ibuprofen or paracetamol, a pharmacy pain-relieving mouth gel, soft food, and warm salt-water rinses that are spat out. Neither page mentions clove oil. Doses depend on your age, other medicines and conditions, so ask a pharmacist. The dentist's job is the cause: that might be a filling, a root canal, an extraction or drainage of an abscess.
What goes wrong when people improvise
- Caustic and cytotoxic effects. Beyond the FDA wording above, eugenol reduced growth and collagen production in human dental pulp cells in a concentration-dependent way in a 2011 lab study (Anpo et al., Odontology, 2011). That was cells in a dish, so treat it as a caution, not a measured injury rate.
- Allergy. Of 10,930 dermatitis patients patch tested with 12 essential oils in Germany, 908 (8.3%) reacted to at least one and 1.6% reacted to clove oil (Geier et al., Contact Dermatitis, 2022). That was skin testing in a referred clinic population.
- Swallowing by a child. A 15-month-old developed fulminant liver failure after swallowing 10 ml of clove oil and recovered with intravenous N-acetylcysteine (Janes et al., European Journal of Pediatrics, 2005). A case report, not a rate, but it is why clove oil stays out of children's reach in our own bottle copy.
- Delay. Reasoning, not a study: a pain-free hour is not a reason to skip the dentist when the NHS cut-off for booking is 2 days.
Where our oils fit
Our clove bud oil (warm, sweetly spicy) and clove leaf oil (bolder, smokier) are for diffusing and diluted skin use at the 0.5% to 2% range on our labels, with a patch test. They are not made, labelled or sold for teeth, and we do not sell any dental or oral product. If you want the broader picture of how dentistry uses eugenol, start with clove oil and oral health; for the other essential oils people search for here, see our toothache oils article; after an extraction the questions change, see dry socket; and for skin and ingestion hazards see side effects.
A dentist for the tooth, a pharmacist for the painkiller, emergency care for swelling that affects breathing: that is the whole plan, and it is deliberately boring.
Clove Essential Oil
Clove Essential Oil from our own shop, in sizes from 0.5 oz to bulk.
From $10.99
Shop Now →Sources & Further Reading
- NHS. Toothache. nhs.uk/conditions/toothache
- Scottish Dental Clinical Effectiveness Programme, 2026. Management of Acute Dental Problems, acute pericoronitis. acutedentalproblems.sdcep.org.uk
- US FDA, 1991. Oral Health Care Drug Products for OTC Human Use; amendment to tentative final monograph (56 FR 48302). govinfo.gov FR-1991-09-24
- NLM DailyMed. Eugenol toothache product label (eugenol 85%). dailymed.nlm.nih.gov
- Alqareer A, Alyahya A, Andersson L, 2006. The effect of clove and benzocaine versus placebo as topical anesthetics. PubMed 16530911
- Reddy MS et al., 2025. Analgesic efficacy of phytotherapeutic agents in dental pain management. PubMed 41322706
- American Dental Association. Adult/adolescent acute dental pain management for toothaches. ada.org
- Anpo M, Shirayama K, Tsutsui T, 2011. Cytotoxic effect of eugenol on osteogenic differentiation markers in human dental pulp cells. PubMed 21706355
- Geier J et al., 2022. Contact sensitization to essential oils: IVDK data of the years 2010-2019. PubMed 35417610
- Janes SEJ, Price CSG, Thomas D, 2005. Essential oil poisoning: N-acetylcysteine for eugenol-induced hepatic failure. PubMed 15895251