Cang Er has the efficacy of dispersing wind-cold, pass through the nose, dispel wind-dampness, but its foot soak is generally difficult to achieve without the role of the treatment of disease. Cang Er taste pungent, bitter, warm, toxic, the main role of the treatment of wind-cold headache, nasal congestion, congested nose, nasal abyss (mainly manifested as obscene nasal discharge, the amount of rubbing not clean), rubella itching, dampness paralysis contracture and other diseases, its adverse reactions and contraindications are not clear. But Cang Er is poisonous, not to be taken in large quantities for a long time. Auricularia foot soak has no therapeutic effect, can only relieve fatigue, if you want to better utilize the medicinal value of Auricularia, it is recommended to use the decoction and other methods, the specific medication should also be used under the guidance of a physician as prescribed by the doctor, do not use your own medication.