Frankincense oil can be used for cough relief through steam inhalation, chest rubs, or diffusion. Its active compounds work by blocking an enzyme that triggers inflammation and mucus production in the airways, which is why it has a long history as a respiratory remedy. While clinical trials specifically on frankincense oil and cough are limited, the anti-inflammatory science behind it is well established.
Why Frankincense Helps With Coughs
The resin that frankincense oil comes from contains a group of compounds called boswellic acids. The most potent of these directly inhibits an enzyme called 5-lipoxygenase, which is a key driver of airway inflammation. When this enzyme is active, it produces inflammatory molecules called leukotrienes that cause three things relevant to coughing: the airways tighten (bronchoconstriction), blood vessels become more permeable (leading to swelling), and inflammatory cells flood into the area.
By blocking that enzyme, boswellic acids reduce the cascade that makes your airways irritated, swollen, and prone to triggering a cough reflex. These compounds also inhibit an enzyme involved in mucus overproduction, one that plays a role in chronic bronchitis and other conditions where excess mucus drives persistent coughing. This dual action, reducing both airway inflammation and mucus secretion, is what makes frankincense oil appealing for respiratory symptoms rather than being a simple menthol-style vapor.
Steam Inhalation
Steam inhalation is the most direct way to get frankincense oil into your airways. Fill a bowl with hot water, but not boiling. Water that’s too hot can scald the delicate tissue in your nose and throat, and it also causes essential oil compounds to break down before you can inhale them. Let boiled water sit for a minute or two before adding the oil.
Add just 1 drop of frankincense oil to the bowl. Essential oils are highly concentrated, and more is not better when you’re breathing them directly into irritated airways. Drape a towel over your head and the bowl to create a tent that traps the steam, then breathe gently through your nose and mouth for a few minutes. Keep your face about 12 inches from the water’s surface. If the steam feels uncomfortably hot or the scent is overpowering, pull back further or lift the towel to let some air in.
You can repeat this two to three times a day when dealing with an active cough. The warm, moist air itself helps loosen mucus, and the frankincense compounds add anti-inflammatory benefit on top of that.
Chest and Throat Rub
A topical chest rub lets frankincense oil absorb through the skin while you also inhale the vapor as it warms on your body. For a body application, dilute frankincense oil to no more than 5% concentration. In practical terms, that’s roughly 15 drops of frankincense oil per tablespoon (15 mL) of carrier oil.
Good carrier oils for this include fractionated coconut oil, sweet almond oil, jojoba oil, or grapeseed oil. Coconut oil absorbs quickly and doesn’t leave a heavy residue, which makes it a good choice for a chest rub you’ll wear under clothing. Apply the blend to your upper chest and throat area, and if you’re coughing enough to have a sore upper back from the effort, rub some there too. The warmth of your skin gradually releases the volatile compounds so you continue inhaling them as you rest or sleep.
Diffusing Frankincense Oil
Using an ultrasonic or cool-mist diffuser is the lowest-effort option and works well for overnight use when coughing disrupts sleep. Add 3 to 5 drops to your diffuser’s water reservoir and run it in the room where you’re resting. Place it within a few feet of where you’ll be sleeping or sitting, but not directly next to your face.
Run the diffuser in 30-minute intervals rather than continuously for hours. Prolonged, uninterrupted exposure to any essential oil can irritate your airways, which is exactly the opposite of what you’re going for. Most modern diffusers have an intermittent setting that cycles on and off automatically.
Which Type of Frankincense Oil to Choose
Frankincense oil comes from several species of the Boswellia tree, and you’ll most commonly see Boswellia serrata (Indian frankincense), Boswellia carterii (also called Boswellia sacra, often labeled as Hojari frankincense), and Boswellia frereana (Coptic frankincense). Research indicates that the anti-inflammatory and immune-modulating effects are not limited to one specific species, so you don’t need to hunt down a particular variety for cough relief.
What matters more than species is quality. Look for oil that is 100% pure, steam-distilled, and sold by a company that provides batch testing results or a GC/MS (gas chromatography) report. Avoid oils labeled as “fragrance oil” or those that list additives. Adulterated oils are more likely to irritate your airways than help them.
Safety Considerations
Frankincense oil is generally well tolerated, but there are several situations where caution is important.
- Children under 6: Do not use frankincense oil, whether diffused or applied to the skin, on children younger than 6. For children 6 and older, use no more than 6 drops mixed with 1 fluid ounce of carrier oil or water, per Cleveland Clinic guidelines.
- Pregnancy and breastfeeding: Avoid frankincense oil during pregnancy and lactation. Safety data is lacking, and some traditional sources report that Boswellia resin may stimulate uterine contractions.
- Blood thinners: Frankincense can interact with warfarin and potentially other anticoagulants. Two case reports documented increased bleeding risk when frankincense was used alongside warfarin, likely because the compounds interfere with the same liver enzymes that metabolize the drug.
- Other medications: Boswellia compounds inhibit several liver enzymes responsible for processing a wide range of drugs, including many common medications for heart conditions, depression, pain, and infections. If you take prescription medications regularly, check with your pharmacist before adding frankincense to your routine.
- Before surgery: Stop using frankincense products at least two weeks before any scheduled surgical procedure, as it may affect bleeding and interact with anesthesia-related drugs.
When a Cough Needs More Than Home Remedies
Frankincense oil is reasonable to try for a mild, dry cough or the lingering irritation that follows a cold. But a cough that persists beyond a few weeks, or one accompanied by thick green or yellow phlegm, wheezing, fever, shortness of breath, or ankle swelling, needs professional evaluation. If you’re coughing up blood or pink-tinged mucus, having chest pain, or struggling to breathe or swallow, that’s an emergency.