Nasal incitement refers to the abnormal movement of the nose, which is often seen in respiratory distress due to hyperthermia, such as lobar pneumonia, and bronchial asthma. Experts pointed out that nasal incitement is a symptom, not an independent disease, and there are many causes of nasal incitement, in order to better treatment of nasal incitement, before treatment patients need to diagnose the disease with the help of some auxiliary tests, so as to more accurately understand the degree of development of the disease. Auxiliary tests: (a) sputum examination smear microscopically visible more eosinophils. (B) Respiratory function test 1. Ventilation function test: Obstructive ventilation dysfunction is presented. During the seizure, the exertional expiratory volume in 1 second (FEV1), the percentage of exertional expiratory volume in 1 second to the expected value (FEV1%), the ratio of exertional expiratory volume in 1 second to exertional lung volume (FEV1/FVC%), and the peak expiratory flow rate (PEF) were significantly reduced. 2.Bronchial diastolic test: If FEV1 increases >15% compared with that before medication (12% and above in the 7th edition textbook, it is recommended to know it), and its absolute value increases >200ml, it can be judged as diastolic test (+), which indicates that airway obstruction is reversible and helps in the diagnosis of bronchial asthma. 3.Bronchial excitation test: It is used to determine the airway reactivity. 4.Maximum expiratory flow rate (PEF) and its variability measurement: the variability of PEF ≥ 20% during the day and night (or early morning and afternoon) is helpful for diagnosis. (C) Blood gas analysis During the attack, there may be a decrease in PaO2, a decrease in PaCO2 due to hyperventilation, and a rise in pH, manifesting as respiratory alkalosis; in severe asthma, it may manifest as respiratory acidosis, and may be combined with metabolic acidosis. (iv) Chest X-ray examination: increased translucency and hyperinflation of both lungs can be seen during asthma attack; in remission, there are mostly no obvious abnormalities.