Native to China.
The essential oil obtained from the aromatic bark and twigs of the tree.
It's generally recommended that Cassia is not used on the skin as it's a very strong dermal irritant and can easily cause sensitisation. Some Aromatherapists will include it in very low amounts along with other synergistic oils.
It can be blended in a base cream or lotion to a maximum of 1% to help alleviate the symptoms associated with rheumatism and arthritis. A skin patch test should be carried out before extended use.
When burned or vaporised Cassia is often suggested for use in cases of fever, colds, flu and it may also be of benefit to the digestive system.
You may find that Cassia blends especially well with the Citrus & Spice oils as well as Lavender, Geranium, Bergamot and Tea Tree.