What causes a dry cough?

The causes of dry cough are diverse, mainly including the following aspects: 1. Environmental factors: such as dry environments with low air humidity, which can easily lead to dryness of the throat and respiratory mucosa, resulting in coughing. 2. Respiratory infections: such as the common cold, influenza, bronchitis, etc., where the infection irritates the respiratory mucosa and triggers a cough response. 3. Allergens: allergic cough is caused by allergens such as pollen, dust mites, pet dander, etc., where an overreaction of the immune system leads to coughing. 4. Pharyngeal diseases: such as pharyngitis, especially chronic pharyngitis and allergic pharyngitis, in which dryness, itching, discomfort, congestion, and swelling of the throat cause persistent dry cough. If you experience a persistent dry cough or accompanying symptoms, it is recommended to seek medical attention promptly.