Read more about tea tree oil and acne at Mayo Clinic.

Promising reviews: “Recommended to me by my waxer. I was a little hesitant at first because it’s pretty expensive, but I haven’t had a single ingrown hair since using this oil. I am diligent about applying the oil, and it’s been great. It lasts — I’ve been using it for about two months, and there’s still a ton in the bottle.” —Megan Harmeyer

“10/10 product; I love this stuff. The oil is thin and has never left oil stains on my clothes. It smells like tea tree oil but once you put it on your skin, the smell fades completely. I use this after I get waxed and after every shower as a moisturizer and to keep away ingrowns. If I do have an ingrown hair, the oil clears it right up and keeps the discoloration to a minimum.” —Ellogovna

Get it from Amazon for $26+ (available in two sizes).