Zhang Nao
Cinnamomum camphora (L.) Presl.
☯ TCM Properties
Clears Heat and Resolves Phlegm from the Orifices; Moves Qi and Resolves Stagnation; Kills Parasites and Stops Itching; Reduces Swelling and Alleviates Pain; Warms the Middle Burner and Stops Pain; Drains Dampness
Western Herbalism Properties
Botanical Description
Cinnamomum camphora, the camphor tree, is a large evergreen tree in the family Lauraceae, native to East Asia, particularly southern China, Taiwan, southern Japan, and Vietnam, and widely planted in subtropical regions worldwide. Mature specimens commonly reach 20-30 meters in height with broad, dome-shaped crowns and stout, deeply furrowed grayish-brown trunks. The alternate, ovate to elliptic leaves are leathery and glossy, with three prominent veins from the base, and emit a strong camphor scent when crushed. Small, six-tepalled, pale yellow-green flowers are borne in axillary panicles in spring, developing into round, dark-purple to black drupes about 1 cm across. All tissues, especially the wood and leaves, contain volatile oil rich in camphor crystals that are distilled and harvested commercially.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| powder | 0.3-1g | Daily | — | — | — |
Cultural & Historical Context
Traditional Chinese Uses
Zhang Nao (camphor) is a warm, pungent aromatic substance used in Chinese medicine primarily as an external remedy to open the orifices, relieve pain, kill parasites, and stop itching. It is applied topically for scabies, ringworm, skin sores, joint pain, and traumatic injuries. Its penetrating, aromatic nature allows it to disperse cold and obstruction from the channels and sinew when used externally. Internal use is limited, as camphor is toxic if ingested in significant amounts, and its primary role is firmly in external applications.
Traditional American Uses
None Documented
Important Disclaimer
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.