It usually starts in the nerves farthest from the brain and spinal cord -- like those in the feet and hands. Then it may move up into the legs and arms. However, if you get treatment for the medical condition causing the nerve damage, you may be able to stop the damage -- and even reverse it.
If swallowed, tea tree oil can cause varying side effects ranging from drowsiness, upset stomach, vomiting, nausea and weakness, to coma, hallucinations, blood cell abnormalities, confusion and ataxia which affects muscle coordination and your ability to move voluntary muscles, states the American Cancer Society.
In addition, research has demonstrated tea tree oil reduces candidaâs ability to adhere to human cell surfaces (Sudjana 2012). Although tea tree oil is occasionally associated with contact dermatitis (when used topically), it is generally considered to be safe. However, it can be toxic when ingested orally, producing a variety of negative effects (e.g., vomiting, diarrhea, and hallucinations) (Larson 2012).