Onion root usually refers to onion whiskers, onion whiskers boiled water does not have the effect of treating cough, cough should be correctly treated under the guidance of a doctor’s diagnosis. Scallion is a kind of Chinese herbal medicine, with the efficacy of dispelling wind and dispersing cold (dispelling wind and dispersing cold), and promoting the circulation of qi and dispersing blood stasis. Clinically, it is mainly used to treat wind-cold headaches, throat sores (reddish flesh in the throat, layers upon layers, causing obstruction to eating and swallowing), hemorrhoids, and frostbite. Its main treatment does not include cough, and it is difficult to use a single Chinese medicine to treat the disease. Chinese medicine treatment of cough needs to be based on the cause of the disease. External cough should be treated according to the situation, and the cough will stop if the lung qi is propagated; internal cough should prevent the lung qi from being too propagated and damaging the positive qi, and should start from regulating the positive qi. Patients with cough need to consult a doctor in a timely manner, under the guidance of a physician to standardize the treatment, do not blindly use their own medication, so as not to cause serious consequences.