Itchy trachea may be caused by allergic cough, cough variant asthma, acute bronchitis and other diseases. 1. Allergic cough: If the patient is frequently exposed to allergens, such as pollen, dust mites, animal fur, etc., it may cause some irritation to the airways, resulting in itchy airways and dry cough. 2. Cough variant asthma: due to the patient’s airway hyperresponsiveness, when the patient is subjected to environmental stimuli, it may lead to bronchial smooth muscle contraction, airway inflammatory cell infiltration, mucus secretion increases, triggering symptoms such as itchy airways and dry cough. 3. Acute bronchitis: acute inflammation of the bronchial tubes caused by infectious, biological, physical and chemical factors can lead to bronchial mucosal congestion and edema, and there may be tracheal itch, cough and other symptoms. Itchy trachea can also be caused by other diseases, if the symptoms are not relieved or aggravated, it is recommended that the patient go to the hospital in a timely manner, improve the relevant examination, to clarify the cause of the disease, and under the guidance of the doctor active treatment.