Yesterday, I broke a pimple. I just bought tea tree essential oil from the body shop and tried it. The next day, I woke up with a big red mark on my face.

This brand of tea tree essential oil is actually not tea tree essential oil. It contains a lot of alcohol and other ingredients. Its main function is anti-inflammatory and sterilization. It is more useful for acne that has been squeezed clean, which can quickly relieve redness, but it has no effect on immature or squeezed acne. I've used this, too, and it's not helpful for acne. The red mark should be that you hurt and inflamed your skin. Now leave it alone and don't touch it. See if it will disappear in a few days.