Lemongrass is a fast-growing aromatic herb; thought to originate from India, today it can be found growing all over the world. It has a sweet and penetrating fragrance, and can be used to clear the air of unpleasant odours. Lemongrass oil is an effective insect repellent and first aid oil used to help fight infections. It is used in many spas, especially in Pacific regions such as Thailand and Indonesia. Not only does the oil combat germs, it provides a relaxing aroma.