Educational information, not medical advice — ask your doctor or midwife.
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Su He Xiang is a sticky brown resin with a sweet smell. It comes from the trunk of a tree called the Oriental sweetgum. In English it is called storax or styrax.
Chinese medicine uses it to wake a person who has fainted or collapsed. It is almost always one herb inside a mixed pill. It is not taken on its own.
Human trials on this herb alone have not been published. It does have a long record in old formulas. A long history of use is not proof that something works.
No one has shown how it works in the body. Lab work points to the oils in the resin. These oils kill germs in a dish and can sting skin.
Old Chinese texts give a different account. They call the resin warm and strong-smelling. They say it opens the senses and moves stuck qi (the body's life energy, in Chinese thought).
Some studies look at the mixed pill Su He Xiang Wan for chest pain. Those studies test the whole pill, not this one herb. So they cannot tell us what the resin does by itself.
You will rarely see this resin sold on its own. It is nearly always one part of a ready-made pill.
Forms you may meet: - raw resin, dark and sticky - Su He Xiang Wan (Storax Pill), an old Chinese mixed pill - compound benzoin tincture, a skin and steam product sold in the West - a trace amount in incense and scent
Buy from a shop or pharmacy that tests what it sells. Cheaper gums are sometimes sold in its place.
The tree does not grow in China. Traders from Arab and Persian lands brought the resin east along the Silk Road. Chinese records go back more than a thousand years, to the Tang era.
The Storax Pill first appears in Song dynasty texts. People carried it for sudden collapse and chest pain.
The resin has its own long past further west. Greek, Arab and European doctors burned it and put it on wounds. That is why it counts as classical in more than one tradition.
Some reactions to Su He Xiang need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Call emergency services at once if someone faints, collapses, or has crushing or spreading chest pain. Do not treat this with a herbal pill.
Get urgent care for swelling of the lips, face or tongue, a spreading rash, or trouble breathing after use.
See your doctor if a cough, wound or belly pain is no better after a few days, or if you are taking heart or blood-thinning medicines and want to try this herb.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Su He Xiang is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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