Onions are not the fastest way to stop a dry cough, onions are food and have no healing properties. Onions are very rich in trace elements, minerals and vitamins, which can provide nutrients and energy to the body, and are helpful in improving immunity. But there is no clear efficacy for cough treatment. The causes of dry cough are more etiological, commonly found in acute pharyngitis, laryngitis and acute bronchitis, allergic cough, but also in pleural disease or mild tuberculosis, lung tumors and so on. It needs to be treated according to different causes, and only by identifying the cause of dry cough and treating the cause can the cough be treated in the fastest way. So patients with dry cough, especially when long-term dry cough, should consult a doctor in time to identify the cause, according to the cause of targeted treatment or treatment. Onions are not effective in treating dry cough.