Citronella oil is a popular essential oil extracted from Cymbopogon Nardus, a certain type of lemon grass. The oil, taken out from the tall thin leaves of Cymbopogon through steam distillation, has a sweet and refreshing aroma with thin consistency. Citronella oil is a natural dewormer. it can also be used for healing orthopaedic problems like osteoarthritis, rheumatoid arthritis,etc. Its antibacterial properties are helpful in reducing skin infections like acne, warts, boils, etc and is also a great pain reliever.