Many topical ingredients, such as essential oils, can irritate the skin if they’re not diluted. Carrier oils, like jojoba and coconut oil, should be used for all essential oils and for the plant extract witch hazel.

Essential oils can also be used for aromatherapy. However, be mindful of your surroundings if you’re using aromatherapy. Some essential oils are toxic to pets and can be dangerous for pregnant people.

Essential oils should never be ingested. Some topicals, such as aloe vera or manuka honey, are not essential oils and can be applied to the skin directly.

Be sure to do a patch test before performing a full application. This is the only way to ensure that you’re not applying an irritating substance to an already sensitive area.

You can do a simple patch test by following these steps:

Apply the topical to your forearm.

Wait 24 hours.

If you experience any itching, inflammation, or other irritation, wash the area thoroughly and discontinue use.

If you do not experience any adverse symptoms within 24 hours, it should be safe to apply elsewhere.