Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for trouble breathing, swelling of the face or throat, fainting, a seizure, or severe confusion.
Call emergency services if the person is unconscious, having a seizure, or having difficulty breathing.
Seek urgent medical advice for widespread hives, significant skin blistering, persistent vomiting, or new wheezing.
If anyone swallows an essential oil, contact your local poison centre promptly rather than waiting for symptoms.
In the United States, Poison Control is available at 1-800-222-1222 .
Contact your healthcare team during routine hours if you develop a mild but persistent rash, headache, nausea, cough, or other unwanted effect after treatment.
Also call if the symptom being addressed is worsening or is not improving as expected.
Every sign above is quoted from the sofidex article on Essential oils therapy. If you are not sure, err upward — it is always reasonable to be checked.