Cang Er Zi is pungent, bitter, warm, with minor toxicity, and belongs to the lung meridian. It is effective in dispersing wind and cold, clearing the nasal passages and dispelling wind and dampness, and is mainly used clinically for the treatment of external wind and cold, fever, head and body pain, nasal congestion and runny nose, nasal abscess, rheumatic paralysis and pain, joint pain, limb constriction, wind rash and itching, scabies, leprosy and other conditions. Caulophyllum has minor toxicity, and the reaction of the drug should be closely observed during clinical application. In addition, this drug can be used for targeted treatment when rhinitis and sinusitis occur frequently in the body. It is recommended that after a clear diagnosis is made under the guidance of a physician, the use of Caulophyllum and the combination of other drugs for comprehensive treatment is recommended.