I have hormonal acne and oily skin and scalp, and even flakey scalp and ears, maybe due to a skin yeast overgrowth, not sure. I read tea tree can help. I have tried every acne product imaginable, including stinky sulphur soap bars, tar soap, benzoyl peroxide, salicylic acid, tea tree oil itself, and all the dandruff shampoos out there and this has topped them all! My daughter brought some when she traveled from of state for a visit. I used it and it kept my acne under control, mostly, and my skin stays less oily. My scalp I am still struggling with, but I know that can be mostly hormones and vitamins I need to balance in my body. I have read that lots of people with acne, may have either issues with yeast overgrowth and or mites, in addition to other issues. Not sure exactly what my cause is(although I know gut and hormones problems are partly to blame). Anyway, this helps a bunch and I feel the tea tree tingle, which is not too overpowering, but enough that it feels like it is getting deep in my pores. I also use in my scalp. If you are not super oily skinned, or do not have acne or dandruff, I would not use this product as it does dry you out significantly. Use a good moisturizer when you use this wash. Somedays I only use once a day, as it keeps my oil controlled after one wash.