Many people have reported that when applying too many different oils or too much of one oil, the body may be subjected to a cleansing response, which can cause headaches, rashes, nausea, burning, diarrhea, etc.
If a remedy is effective, then it must have the potential to cause side effects. Although my own family was not hurt (that I know of) by my use of essential oils .
How to Use Essential Oils Effectively. A Comprehensive Overview. By David Crow, L.Ac. Learn How to Use Essential Oils Effectively. Top Seven Tips: The Seven .