Allergic cough is very different from a cold and cough. First of all, a cold cough is very simple, that is, a short cough, often with early symptoms, such as sore throat, then itchy throat, and then cough. On the basis of this cough, he will have some cold symptoms, such as runny nose, low fever and sore throat. It is an incurable chronic cough in allergic cough, which can only be diagnosed for more than 4 weeks. So this kind of cough is not accompanied by other symptoms, such as sore throat, lazy body and runny nose, but this kind of cough is coughed in the early hours of the night or before going to bed, with less expectoration, mainly dry cough or a little thin white sputum, and generally no fever. This is allergic cough.

Allergic cough's course of treatment is very long, and no medicine can achieve such good results. It will be better to take some medicine for a cold and cough, and it can also be treated with a vapo atomizer. There is a great difference between allergic cough and cold cough in clinic. Symptoms are all cough, but they have their own characteristics in differential diagnosis, such as cough of allergic rhinitis. These patients have severe nasal symptoms. For example, taking a plain film may reveal sinusitis in the sinuses. In addition, the treatment of the nose is also very important. If the allergic cough associated with asthma is asthma, the test will find problems, such as lung function. If the lung function is stimulated, if the stimulation test is positive, usually cough variant asthma, then some patients' stimulation test is not positive, but if the allergic cells in sputum are examined, if the eosinophils are higher than 3% or exhaled nitric oxide, exhaled nitric oxide is a gas related to allergic cells. If this value is very high, it indicates allergic inflammation of trachea, which can also be considered as allergic cough.