9. Hand Helper
Instead of carrying around store-bought hand sanitizers, or washing your hands every 30-minutes, you might want to try a tea tree oil solution, says Healthline. It cites studies that claim the oil kills bacteria and viruses that can cause illnesses (including E. coli).
The oil can also boost the effectiveness of other hand washes in destroying E. coli, it adds. The source provides a link to homemade hand sanitizer using tea tree oil (as well as lavender oil, witch hazel, aloe vera gel, and vitamin E oil), courtesy of DIY Natural.

10. Antibiotic Aid
Antibiotic resistance is a thing, and it can cause treatments meant to erase bacterial infections to fail, says DrAxe.com. Basically, this occurs when people overuse antibiotics, leading to the rise of antibiotic-resistant bacteria.
However, the source says tea tree oil has been used as a natural replacement (or in conjunction with conventional treatments) thanks to its “powerful antibacterial agents, without the adverse side effects.” It cites research published in The Open Microbiology Journal that shows essential oils (including tea tree oil) “have a positive synergistic effect” when combined with antibiotics, giving hope to researchers it could reduce antibiotic resistance.

11. Dynamite Decongestant
Livestrong.com explains that tea tree oil can be a powerful ally to bust through blocked nasal passages. It says that while breathing steam can be effective for congestion on its own, adding tea tree oil can increase its effectiveness (add 2-drops of the oil to a boiled cup of water and breathe in the vapors).
You can also put tea tree oil directly into a vaporizer (during the day or night), or put it on a cloth to be inhaled throughout the day, it adds. The last method should only be done for short periods of time, and it’s best to inhale through the nose and exhale from the mouth, it advises.