What to Know about Cumin Oil - Pure Organic Essential Oil - Mayans Secret News. Cumin oil, which is safe to use in your food, can cause blisters if you put it on your skin. Citrus oils that are safe in your food may be bad for your skin, especially if you go out into the sun. And the opposite is true, too. Eucalyptus or sage oil may soothe you if you rub it on your skin or breathe it in. But swallowing them could cause a serious complication, like a seizure.
