Eucalyptus oil is an essential oil derived from the leaves of the eucalyptus tree, primarily the species Eucalyptus globulus. It is known for its strong, fresh scent and is commonly used in aromatherapy, as well as in various household products for its antiseptic and anti-inflammatory properties. This oil is often used to relieve respiratory issues, such as coughs and congestion, by acting as a natural decongestant. Additionally, eucalyptus oil can be found in topical ointments and creams, where it helps soothe muscle pain and promote healing.