Variously called Death Day, Decision day, and a number of other less kind words, D-Day was the day that the Allies began the big push from the coast of France all the way to the heart of Germany, ending WWII.
More importantly when it comes to cystic acne, tea tree oil can be harmful to your skin when applied in high concentrations. Some individuals have reported severe skin irritation and allergic dermatitis after applying too much tea tree oil, or applying the proper dose too frequently.
So not that you know why tea tree oil is one of the best ways to cure acne, here are a few methods to use it: Tea tree has healing properties but it also has toxins that are harmful when taken internally. Hence, any way you use it, should be external.