There are no medical guidelines recommending onions as a treatment for coughs. Onions are an ingredient with no pharmacological effect, and as a spicy and irritating food, eating them may aggravate coughs. Onion has rich nutritional value, every 100g onion is rich in potassium 147mg, vitamin C 8.0mg, zinc 0.23mg and other nutrients, is commonly used as an ingredient. However, onions can not treat cough, coughing onions may be eaten on the respiratory tract to produce stimulation, thus aggravating the cough. Currently, for cough, the cause of the cough needs to be clarified before treatment, and the treatment includes the cause of the cough and symptomatic treatment. For example, when a cough is caused by a cold, it is usually due to a viral infection, so the treatment can be oral antiviral medication for the cause of the treatment, and when the cough symptoms are serious and affect the life of the cough, you can take cough medicine, such as cough syrup and other cough suppressants for symptomatic treatment. Therefore, when the cough, should go to the regular hospital, clear cause, follow the doctor’s instructions for treatment, avoid unauthorized use of drugs.