Clove oil is not considered safe for use on or around babies. The oil’s dominant active compound, eugenol, is a potent chemical that can cause liver damage, nervous system depression, and severe skin reactions, and infants are especially poorly equipped to handle it. Despite a long folk tradition of dabbing clove oil on sore gums during teething, published case reports of serious poisoning in children under two years old make a strong case against the practice.
What Makes Clove Oil So Potent
Clove oil gets its distinctive smell and numbing bite from eugenol, a compound that typically makes up the bulk of the oil. One analysis of clove leaf oil found eugenol accounted for roughly 77% of the total composition, with beta-caryophyllene at about 17% and smaller amounts of other volatile compounds filling out the rest.1PubMed. Chemical composition and antioxidant properties of clove leaf essential oil Broader reviews put eugenol content at a minimum of 50%, with variations depending on the plant part used and how the oil is extracted.2PubMed Central. Clove Essential Oil (Syzygium aromaticum L. Myrtaceae): Extraction, Chemical Composition, Food Applications, and Essential Bioactivity for Human Health
Eugenol is the reason clove oil can numb a toothache. It interferes with nerve signaling at the site of application, which is why dentists have historically used eugenol-containing preparations in their practices. But eugenol is also the reason clove oil is dangerous: in larger quantities, or in a body that cannot process it efficiently, the same compound causes serious organ damage. The concentration of eugenol in undiluted clove oil is far higher than what appears in the trace amounts of clove used as a food spice. A drop of pure clove oil delivers a pharmacologically significant dose of eugenol all at once.
Why Infants Are Especially Vulnerable
Babies face a triple disadvantage when it comes to clove oil exposure. First, their livers are immature. The enzyme systems responsible for breaking down and clearing foreign chemicals from the body are not fully developed at birth and take months to years to reach adult capacity. Eugenol is metabolized in the liver, and when an infant’s liver cannot keep up, the compound and its breakdown products accumulate to toxic levels.
Second, infant skin is thinner and more permeable than adult skin. When clove oil is rubbed onto a baby’s gums or skin, a larger proportion of the eugenol passes through into the bloodstream compared to what would happen in an adult. The oral mucosa, the soft tissue lining the mouth, is especially absorbent, which means gum application is one of the most efficient ways to deliver a concentrated dose of eugenol straight into circulation.
Third, babies are small. A volume of clove oil that might cause mild irritation in an adult represents a much larger dose per kilogram of body weight in a five-kilogram infant. The margin between “enough to numb” and “enough to poison” shrinks dramatically.
Liver Damage From Ingestion
The most alarming risk of clove oil in young children is fulminant hepatic failure, which is a sudden and severe collapse of liver function. Multiple case reports in the medical literature document this in toddlers. In one published case, a 15-month-old boy developed fulminant hepatic failure after swallowing about 10 milliliters of clove oil. Within 24 hours his liver enzyme levels had spiked to more than 13,000 units per liter, a level indicating massive liver cell death, and his kidney function had also deteriorated.3PubMed. Essential oil poisoning: N-acetylcysteine for eugenol-induced hepatic failure and analysis of a national database In another case, a child who ingested clove oil developed fulminant hepatic failure requiring treatment with intravenous N-acetylcysteine, the same antidote used for acetaminophen overdose. The child recovered over about 72 hours.4PubMed. N-acetylcysteine for the treatment of clove oil-induced fulminant hepatic failure
Laboratory work on liver cells has helped explain the mechanism behind this damage. Eugenol depletes a key protective molecule called glutathione inside liver cells. Glutathione is essentially the liver’s built-in antioxidant shield, and once it is exhausted, liver cells become vulnerable to damage from reactive metabolites. Research on cultured liver cells found that eugenol also disrupted communication between neighboring cells and that the toxic effects appear to be driven by a reactive breakdown product of eugenol rather than by eugenol itself.5Toxicology and Applied Pharmacology. Comparative Toxicity of Eugenol and Its Quinone Methide Metabolite in Cultured Liver Cells Using Kinetic Fluorescence Bioassays In practical terms, the liver damage starts a chain reaction: once glutathione is used up, cells begin dying, and the damage accelerates.
Ten milliliters is not a large volume. It is roughly two teaspoons. Bottles of essential oil often contain 10 to 30 milliliters and may not have child-resistant caps. For a toddler who gets hold of an open bottle, swallowing a dangerous amount is disturbingly easy. The clinical literature is clear that ingesting as little as 10 ml causes hepatotoxicity in a small child.3PubMed. Essential oil poisoning: N-acetylcysteine for eugenol-induced hepatic failure and analysis of a national database
Nervous System Depression
Liver damage is not the only organ-level risk. A published case described a 7-month-old infant who developed central nervous system depression after accidental oral administration of clove oil. The child also showed urinary abnormalities and a large anion-gap acidosis, a metabolic disturbance indicating the body was being overwhelmed by toxic byproducts.6PubMed. Clove oil ingestion in an infant
Central nervous system depression in a baby can mean anything from excessive drowsiness and poor feeding to unresponsiveness and respiratory failure. In the 7-month-old case, the combination of CNS depression and metabolic acidosis required emergency medical intervention. This is worth emphasizing because parents who apply clove oil to a baby’s gums may not realize that the infant can swallow a meaningful amount, especially when fussing and drooling during teething. The oil does not stay on the gums. It mixes with saliva and is swallowed, putting the liver and nervous system at risk even from topical use.
Skin Reactions and Allergic Sensitization
Even setting aside the risks of ingestion, clove oil applied to the skin or gums can cause local damage. Eugenol is both a primary irritant and a sensitizer, meaning it can cause an immediate irritation reaction on first contact and can also prime the immune system to mount an allergic response on future exposures. Documented skin reactions to eugenol include contact urticaria (hives at the application site), chronic urticaria, and allergic contact dermatitis.7PubMed Central. An unexpected positive hypersensitive reaction to eugenol
Clove oil is among a handful of essential oils that consistently show elevated rates of allergic reactions in patch testing. In a review of essential oils tested in patients suspected of contact dermatitis, clove was one of nine oils that produced positive reactions in more than 2% of people tested, and most reactions were associated with application of pure oils or high-concentration products.8PubMed. Essential Oils, Part IV: Contact Allergy Two percent might sound low, but patch testing is done on adults in controlled settings. A baby’s skin is thinner and more reactive, and the inside of the mouth is far more sensitive than forearm skin where patch tests are typically applied.
What makes sensitization particularly sneaky is that the first exposure may cause no visible reaction at all. The immune system quietly learns to recognize eugenol as a threat, and then a second or third exposure triggers a much stronger response. Parents who use clove oil once “without problems” and then try it again may find their baby develops swelling, redness, or blistering that was not present the first time. This is not the oil becoming more concentrated; it is the immune system escalating its response.
Effects on Blood Clotting
Clove oil has another property that most parents are unaware of: it inhibits blood clotting. Research has shown that clove oil suppresses platelet aggregation, the process by which blood cells clump together to form a clot. Two antiplatelet compounds have been identified in clove oil, eugenol and acetyl eugenol, both of which interfere with the biochemical signals that trigger clotting.9PubMed. Antiplatelet principles from a food spice clove (Syzygium aromaticum L) In lab studies, clove oil was a potent inhibitor of aggregation triggered by several different activating agents, and animal experiments demonstrated that it could provide substantial protection against induced blood clots at doses in the 50 to 100 mg/kg range.10PubMed. Antithrombotic activity of clove oil
For adults, this antiplatelet activity is occasionally discussed as a potential therapeutic benefit. For babies, it is a risk. Infants already have a less mature coagulation system than adults, and adding a blood-thinning agent on top of that can increase the risk of prolonged bleeding. If a baby is teething and the gums are already inflamed or slightly torn, applying an antiplatelet compound directly to the site could make bleeding worse rather than better. The effect is reversible once the compound clears the body, but in an infant with limited metabolic capacity, clearance takes longer.
Why the “Natural” Label Is Misleading Here
A common misconception driving clove oil use on babies is the assumption that “natural” means “gentle.” Essential oils are highly concentrated plant extracts. Clove oil contains eugenol at concentrations that would never occur in a food context. You would need to consume an enormous quantity of whole cloves in cooking to approach the eugenol dose delivered by a single drop of essential oil. The concentration process strips away the diluting matrix of plant fiber, water, and other compounds, leaving behind a chemical payload that the body treats as a drug, not a food.
Adding to this confusion is the fact that essential oil products vary widely in composition and labeling. A review in ACS Omega noted that lack of quality standards and progressive adulteration in natural oils have deteriorated their therapeutic reliability.11ACS Omega. Quality Standards and Pharmacological Interventions of Natural Oils: Current Scenario and Future Perspectives What this means for a parent is that a bottle labeled “clove oil” may contain varying eugenol concentrations, synthetic additives, or contaminants, and there is no straightforward way to know what you are actually getting. Unlike pharmaceutical products, essential oils sold as aromatherapy or home remedies typically do not undergo the rigorous standardization and testing that would ensure consistent dosing. This makes it impossible to calculate a “safe” amount for a baby, even if such an amount existed.
Safer Ways to Handle Teething Pain
If clove oil is off the table, what actually works for teething? The evidence supports several alternatives that carry far less risk. A systematic review of teething treatments found that teething rings were among the most effective non-pharmacological options, with the majority of parents in the reviewed studies reporting improvements in drooling, sleep disruption, gum irritation, and crying.12Brazilian Oral Research. Efficacy of treatments used to relieve signs and symptoms associated with teething: a systematic review Chilled (not frozen) teething rings provide counter-pressure and mild numbing through cold, without introducing any chemicals into the baby’s system.
Other approaches that pediatricians commonly recommend include:
- Gum massage: Gently rubbing the baby’s gums with a clean finger provides counter-pressure that can soothe discomfort.
- Chilled washcloth: A damp washcloth cooled in the refrigerator gives the baby something safe to gnaw on.
- Age-appropriate pain relief: For babies over six months, acetaminophen or ibuprofen at pediatrician-recommended doses can manage pain when non-drug methods are not enough. These medications have well-established safety profiles and dosing guidelines for infants, unlike essential oils.
It is worth noting that the FDA has warned against topical teething gels containing benzocaine for children under two, due to the risk of a rare but serious blood condition. That warning sometimes pushes parents toward “natural” alternatives like clove oil, but the published case reports of liver failure and CNS depression in infants show that switching from one risky product to another is not a solution.
What to Do If a Baby Is Exposed to Clove Oil
Accidental ingestion of clove oil in a young child is a medical emergency. The published cases in which children developed liver failure involved relatively small volumes, and symptoms can escalate quickly. If you know or suspect a baby has swallowed clove oil, call poison control or go to an emergency room immediately. Do not wait for symptoms to appear; liver damage can progress rapidly over the first 24 hours.
In the documented cases, treatment with intravenous N-acetylcysteine proved effective at reversing the liver damage when administered promptly.4PubMed. N-acetylcysteine for the treatment of clove oil-induced fulminant hepatic failure N-acetylcysteine works by replenishing the glutathione that eugenol depletes, essentially refilling the liver’s protective reserves before too many cells are destroyed. The children in the published reports recovered, but they required intensive hospital care. Early intervention was a key factor in their outcomes.
For skin exposure, wash the area thoroughly with soap and water. If you notice redness, swelling, or hives on the baby’s skin or inside the mouth after contact with clove oil, contact your pediatrician. Allergic sensitization from eugenol can develop even after a single exposure and may worsen with repeated contact.7PubMed Central. An unexpected positive hypersensitive reaction to eugenol
Dilution Does Not Solve the Problem
Some sources suggest that diluting clove oil in a carrier oil makes it safe for babies. This advice is well-intentioned but flawed for several reasons. First, there is no established safe dilution ratio for infants. Adult guidelines for essential oil dilution (typically around 1 to 2% for skin application) are not validated for babies, whose skin absorbs more readily and whose livers process compounds less efficiently. Second, even a heavily diluted clove oil applied to the gums will be swallowed. The oral mucosa does not hold onto oil the way skin on an arm might; the baby’s constant drooling and swallowing means the oil enters the digestive tract regardless of concentration.
Third, the antiplatelet and sensitizing effects of eugenol do not require large doses to manifest. The allergic sensitization pathway, in particular, can be triggered by very small amounts of eugenol once the immune system has been primed. Dilution reduces the risk of acute toxicity but does not eliminate the risk of allergic reactions or cumulative effects with repeated use. Given that effective and well-studied alternatives exist for managing teething pain, the risk-benefit calculation for diluted clove oil in babies still comes out negative. There is simply no scenario in which a baby needs clove oil, and several scenarios in which it can cause serious harm.