The camphor tree, a close relative of cinnamon, is a native of northeast Asia where it has been used for many centuries. Crude camphor is a substance that crystallizes inside the tree as it matures. It is usually harvested from trees that are at least 50 years old.
Crude camphor is steam distilled from the wood and further processed to separate it into three or four distinct chemical fractions. White camphor is the lightest, most volatile fraction. It is the least toxic and considered to be superior therapeutically.
Camphor reduces pain, spasms and inflammation, promotes tissue healing and stimulates local circulation. It is used to treat pain and inflammation associated with all manner of strains and traumatic injuries of the muscles,ligaments and tendons as well as in chronic rheumatic conditions such as arthritis and gout.
None when used topically.