I think I somehow became allergic to my tea tree oil shampoo and conditioner. Hadn’t used it in a few months since getting something different. Brought it back out to start using on my daughter. Well it was just there so I used it the last few showers in the last like 4 days. My heads been itching like CRAZY. Making me think I caught my daughters lice infestation (which is now gone). But I’ve been checked multiple times by two different people and I don’t have it. Tonight’s shower did NOT include the tea tree oil stuff and I’ve had almost no itching.