Eucalyptus oil is available as an essential oil that is used as a medicine to treat a variety of common diseases and conditions including nasal congestion, asthma, and as a tick repellant. Diluted eucalyptus oil may also be applied to the skin as a remedy for health problems such as arthritis and skin ulcers.
To make a eucalyptus inhalant, add a few drops of eucalyptus oil or a handful of leaves to hot water or a vaporizer and deeply inhale the steam vapor for five to 10 minutes (take care not to burn yourself). You can also use eucalyptus oil in a warm bath or shower.
In one lab study, it outperformed the standard herpes medication, acyclovir. The 1,8-cineole chemical in the oil shuts down virus particles and may block them from entering cells. In lab tests, eucalyptus oil was able to curb the spread of the virus by more than 96%.