James Thurber: I loathe the expression What makes him tick. It is the American mind, looking for simple and singular solution, that uses the foolish expression. A person not only ticks, he also chimes and strikes the hour, falls and breaks and has to be put together again, and sometimes stops like an electric clock in a thunderstorm.
But watch out, this is a liquid you want to keep far away from your mouth. Tea tree oil is dangerous if taken by mouth. It can cause serious side effects such as confusion, inability to walk, unsteadiness, rash and coma, says board-certified dermatologist Dr. Janet Prystowsky.
Ways to Use Tea Tree Oil for Itchy Scalp. 1  If you can stand the strong composition of tea tree oil, use it undiluted. Take 5-10 drops of this oil and gently massage into your scalp.  If your skin is too sensitive, dilute tea tree oil with some baby shampoo. Add 10-20 drops of tea tree oil to 1/2 cup of baby shampoo.