Allergies to "Pure" Oil?

Megan Tiehes, Certified Professional Aromatherapist

5/29/20261 min read

green plant on selective focus photography
green plant on selective focus photography

Can you be allergic to a “PURE” essential oil?

The answer is a resounding YES.

One of the biggest misconceptions I heard when first introduced to essential oils was the idea that people only react to “impure,” adulterated, or synthetic oils. Some even claimed that reactions to “truly pure” oils were impossible because these oils are “natural.”

The idea that a substance cannot cause a reaction simply because it is “natural” is not supported by science or real-life experience.

I am allergic to cedar. When I was around 11 years old, I got a splinter in my arm from a cedar tree. This caused an allergic response that included a rash and swelling in my arm. What was my body reacting to? The tree’s natural oils and chemical compounds.

Those same naturally occurring compounds are what are extracted when producing cedarwood essential oil (Juniperus virginiana).

I also have children with allergies and sensitivities to lavender (Lavandula angustifolia) — both the plant itself and the highly concentrated essential oil extracted from it.

One well-known example is poison ivy. Many people are highly allergic to the natural oil urushiol found in this plant.

This does not mean purity is unimportant. Adulterated oils and synthetic fragrance oils absolutely carry safety concerns. However, even “pure,” authentic oils can cause irritation, sensitization, or allergic reactions in certain individuals.

Some possible signs of irritation or allergic reaction to be aware of may include:

  • Redness

  • Burning or stinging sensations

  • Itching

  • Rash or hives

  • Swelling

  • Respiratory irritation after inhalation

  • Headaches or nausea from aromatic exposure

Education and safe usage matter.

Be safe. Be aware. Be intentional.