If you consider that your child has an allergic cough, it is recommended that you go to the hospital and hang up a respiratory or asthma clinic, or now there is a special allergy department, which is often referred to as an allergy department, to make the appropriate assessment of the baby, and to carry out the necessary tests to determine whether the baby has an allergic cough, or whether there is a cough allergic asthma disease. Let’s say your child has been coughing for a long time, about 1-2 months, during which time the parents have brought their child to the doctor repeatedly and visited many places to see the anti-inflammatory medicines and cough suppressants, but he or she is not getting better. If you come to the professional department, may be based on the baby’s medical history, clinical symptoms, related examination, consider the child may be allergic cough, which is also known as cough variant asthma, to further confirm the diagnosis, give the child a physical examination of the bronchodilatation test, or bronchial excitation test, through the two experiments excitation of the bronchial tubes, the existence of a high degree of allergy or hyperreactive state. Normal people’s bronchial tubes have a certain resistance to inflammatory reactions and allergens, but for allergic children, the bronchial sensitivity is increased, very small stimuli, such as cold air, or even the smell of frying fumes may trigger the child’s airways to react, so that a long period of coughing does not relieve the symptoms of non-specialized doctors may not be able to find the real cause, it is easy to diagnose wrongly, so the clinical examination is often necessary to Two tests are done. In addition to these two tests, the most common test used by doctors in the respiratory or asthma clinic or the allergy department is the nitric oxide test, which is used to check the degree of the child’s bronchial sensitization, to see how the child’s airways are reacting to external stimuli, and to clarify the child’s bronchial sensitization status through clinical examination. At the same time, specific allergens may need to be checked, and even in children with a prolonged cough, a routine lung CT or chest X-ray may be performed. Part of the child may occur every day cough symptoms, but not necessarily airway allergies or cough change disease, may be the upper airway syndrome, or the five sensory diseases, such as rhinitis, sinusitis, or post-infectious slow cough, etc., the disease can also cause a long period of unrelieved cough. So there may be a need to take the baby further to the ear, nose and throat department for examination, clear diagnosis, standardized treatment.