While essential oils can be helpful, they are not always recommended. Avoid using them in these ways or if these circumstances describe you. Undiluted: Essential oils are highly concentrated—applying the oil without first diluting it with a carrier oil may cause negative effects, including rashes. Mixing an essential oil with a base oil, like coconut oil, makes it safer to use. By consumption: Even though essential oils can be safe to inhale or apply to your skin, you should never consume the oil without first talking to your doctor. Essential oils could badly react if you’re taking any medication or have a pre-existing condition. Talking with a healthcare provider first prevents any unnecessary risks. If you’re allergic: Before regularly using an essential oil, do a patch test to make sure you’re not allergic. Apply a small amount of essential oil to the inside of your wrist and wait 24 hours. If you don’t experience any rashes or itchy skin, the oil is safe to use. If you’re pregnant: Using essential oils mixed with a carrier oil may have negative effects on you and your baby. There’s still unknown information on how essential oils can affect us internally. If you’re pregnant, it’s strongly recommended that you avoid consuming any essential oil. Lotions or bath products that contain essential oils are generally safe but check with your doctor just in case.