The volatile oil density is very high or the excessive use can cause the skin surface to be unable metabolism, forms burns, causes the skin to become dark, even possibly causes the skin long papula.

• 精油浓度很高或过量使用会导致皮肤表面无法新陈代谢，形成灼伤，使皮肤发黑，甚至可能导致皮肤长丘疹。