Can essential oil diffusers trigger breathing problems in babies?

What's in the mist

Essential oil diffusers break oils into tiny droplets and release them into the air as a fine mist. Oils like eucalyptus, lavender, tea tree, and peppermint contain volatile organic compounds (VOCs) that give them their scent. In a closed nursery, these compounds build up quickly, and a baby's lungs are still developing and much more sensitive to airborne irritants than adult lungs.

Many parents use diffusers thinking natural means safe. But "natural" essential oils are concentrated plant extracts that can be potent airway irritants.

What the research says

A 2026 study examined the respiratory effects of essential oil diffuser emissions. The researchers found that essential oil aerosols contain VOCs and ultrafine particles that can irritate airways and trigger inflammatory responses, particularly in people with developing or sensitive respiratory systems.

The study specifically raised concerns about use around infants, whose airways are narrower, whose breathing rate is faster (meaning they inhale more particles per pound of body weight), and whose lungs lack the full protective mechanisms that adults have.

Some oils were worse than others. Eucalyptus and tea tree oil were among the strongest airway irritants, yet they are commonly marketed for use during cold and flu season, exactly when parents are most likely to diffuse them near a sick baby.

Safer alternatives

Skip the diffuser in the nursery entirely, especially while your baby sleeps. If you want a calming scent, place a drop of lavender oil on a cloth outside the room rather than aerosolizing it. Keep the nursery well-ventilated. Wait until children are older before introducing diffusers into their sleeping space.