Acne should be allergic, because pure essential oils is irritating to the skin. Sometimes, wearing a necklace can also be allergic, long bag. I also have this kind of essential oil bottle, but it's hanging in the closet, next to the office computer. Don't you think it's charming if you wear it as a necklace? Essential oils evaporate easily. I have never heard of cancer. Essential oil has been discovered and invented by the west for many years. If you have cancer or get sick. . .