A Scents Worth Effects on the Mind - Eucalyptus Lemon is a stimulating oil used to combat mental exhaustion and aid in concentration. Effects on the Body - Invaluable as an inhalant and chest rub for the respiratory system, decongesting the head and chest, expelling mucus, reducing fever and preventing the spread of infection. Helpful in easing pain of arthritis, rheumatism, and other muscular aches and pains. This is a great natural bug repellant.