Its leaves and oil have been consumed, chewed, and applied to the skin for many conditions.
Eucalyptus contains many different chemicals. These chemicals might have various effects in the body. Also, some research suggests that eucalyptus may have activity against bacteria and fungi.
People use eucalyptus for many conditions including asthma, bronchitis, flu (influenza), and many others, but there is no good scientific evidence to support these uses.