What causes a dry cough?

Dry cough refers to a cough without apparent phlegm production and may be caused by the following factors: 1. Upper respiratory tract infection: Infections such as pharyngitis or rhinitis can cause throat discomfort and stimulate a dry cough. It is usually accompanied by symptoms such as throat itching and dryness. 2. Allergic reaction: Exposure to allergens such as pollen, dust mites, or pet dander may trigger allergic coughing. It is usually accompanied by other allergic symptoms such as runny nose and sneezing. 3. Airway irritation: Long-term exposure to smoke, air pollution, or other irritants can cause a dry cough. This type of dry cough usually does not respond well to common cough medications. If a dry cough persists for a prolonged period or is accompanied by other symptoms such as weight loss, worsening cough at night, or difficulty breathing, prompt medical consultation is advised to determine the underlying cause and develop an appropriate treatment plan.