1, Cang Erzi, Chinese medicine. Alias: lice horse head, Cang Er Zi, old Cang Zi, Cang Cang Zi. Belonging to the Asteraceae, Cang Er is an annual herbaceous chrysanthemum plant with involucre fruit, Cang Er Zi belongs to the commonly used Chinese herbs, with the efficacy of dispersing wind and removing dampness through the orifices.

2, Cang Erzi flavor pungent, bitter, warm. Toxic. Disperses wind and dampness, passes the nose and orifices, relieves pain and kills insects. Used for wind-cold headache, nasal congestion and runny nose, toothache, wind-cold and damp paralysis, limb contracture, scabies, itching.

3, Cang Er stem, leaf flavor bitter, pungent, cool. There is a small poison. Dispel wind and dissipate heat, detoxify and kill insects. Used for head wind, dizziness, dampness paralysis contracture, eye redness, eye cataract, boils and poisonous swelling, leakage, leprosy.

4. Cangdong root is used for boils, carbuncles, tangled throat wind, dengue, hypertension, dysentery.