a very close friend of mine is allergic to olive oil and she gets massive underground hard as rock zits whenever she eats it.

totally check it out with a derm but also consider solving the problem from the source as others have mentioned: diet, allergies, etc

NAET - Nambudripad's Allergy Elimination Techniques are alternative allergy medications used to reduce or eliminate allergy and disease is phenomenal if you get the right practitioner (your appointments should be about one hour long)