The name of the drug in the question is incomplete; the correct drug name is Yu Ping Feng San. Allergic rhinitis belongs to the category of congested nose in traditional Chinese medicine. Taking Yupingfeng San can be used to treat congested nose caused by lung qi deficiency and coldness, and to improve the symptoms of nasal itching, runny nose, sneezing, etc. It is usually used in conjunction with other medicines. Congested nose is categorized into four types according to clinical features: deficiency of lung qi and cold, weakness of spleen qi, insufficiency of kidney yang, and ambient heat in lung meridians. 1. People with weak and cold lung qi are characterized by nasal itching, frequent sneezing, clear snot like water, nasal congestion, fear of wind and fear of cold, spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with a little movement), shortness of breath and laziness, or cough with sputum sparse, which can be treated with the addition and subtraction of Yupingfengsan and Gui Zhi Tang. 2. For weak spleen qi, itchy nose, sneezing, sneezing, nasal congestion, poor appetite (no appetite, less food), bloating and loose stools (thin and unformed feces), and fatigue, add and subtract tonic zhong yi qi soup for treatment. 3. Kidney yang deficiency can be seen in long flow of clear snot, nasal itching, sneezing, nasal congestion, cold (cold body), cold limbs, lumbar and knee soreness and weakness, long and clear urine, or spermatorrhea and premature ejaculation, can be used to Zhenwu Tang plus or minus treatment. 4. For those with ambient heat in the lung meridian, there is nasal itching, sneezing, runny nose, nasal congestion, which often occurs in hot and stuffy weather, or coughing, itchy throat, dry and irritable mouth (irritable and stuffy), which can be treated with the addition or subtraction of Xinyi Lung Clearing Drink. If there is any discomfort, it should be treated with medication under the guidance of a Chinese medicine practitioner, and should not be used on its own, so as not to cause adverse reactions and delay treatment.