Conclusion
In summary, it is absolutely safe to make use of tea tree oil, but it is also possible for certain individuals to react to the oil. Therefore, it is advisable that you do a skin test before proceeding to apply it to a large surface area of the skin.
References;
[1] https://en.wikipedia.org/wiki/Antimicrobial
[2] https://medlineplus.gov/sexuallytransmitteddiseases.html
[3] https://en.wikipedia.org/wiki/Candida_albicans
[4] https://medlineplus.gov/viralinfections.html
[5] https://www.healthline.com/health/itching