Cang Er Zi more into the water decoction or into the pill, powder, its external foot soak may have the efficacy of expelling wind-dampness, can be used for rashes, itching, dampness paralysis contracture, etc., but only a single flavor of traditional Chinese medicine, so the efficacy is limited. Cang Er Zi is the dry mature fruit with involucre of Cang Er, family Asteraceae. It is pungent, bitter, warm and toxic. Attributed to the lung meridian. It can disperse wind-cold, open the nose and dispel wind-dampness. Used for wind-cold headache, nasal congestion, congested nose, nasal congestion, nasal abyss (mainly manifested as filthy nasal mucus, the amount of wiping not clean), wind rash itching, dampness paralysis contracture. Blood deficiency headache should not take Cang Er Zi, overdose is easy to cause poisoning, it is recommended that patients do not self-medication, such as the need for medication, it is recommended to follow the doctor’s instructions.