Do you use tea tree oil ? If so for what and how do you use it?

I used it one time when I had a mole removed to help minimize a scar. I also bought it just in case when lice went around the school but didn't need to use it.

I bought some to use in a spray to keep bugs off my dog. Then I read it is toxic to dogs. I never did use it, and I am ot sure where it ended up.

My husband used it, and it helped with his psoriasis condition.