Exhaled nitric oxide high small airway also a little inflammation, usually refers to the exhaled gas nitric oxide higher than normal, most commonly seen in allergic diseases or airway hyperresponsive disease, can be treated by oral anti-allergy drugs, inhaled glucocorticoids and so on. Exhaled nitric oxide test is mainly to reflect the level of airway inflammation, the normal value of the measurement of adults is 25ppb or less, more than 25ppb is considered to have been elevated, elevated is common in allergic diseases or airway hyperresponsive diseases, such as allergic cough, bronchial asthma, eosinophilic bronchitis and so on. Allergic cough can be relieved by taking anti-allergy medications such as loratadine tablets and levocetirizine. Inhaled glucocorticosteroids such as fluticasone and budesonide can be used in case of asthma or eosinophilic bronchitis. There are other diseases that can cause exhaled breath nitric oxide higher than normal, it is recommended to consult a doctor in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor, so as not to delay the condition.