What causes a dry cough?

Dry cough is a common respiratory symptom with various causes. The main causes include: 1. Environmental factors: such as dry environments, dust, smoke, and other irritants that can stimulate the respiratory mucosa and trigger a dry cough. 2. Disease-related factors: multiple respiratory diseases, such as the common cold, bronchitis, laryngitis, allergic cough, bronchial asthma, interstitial pneumonia, pulmonary tuberculosis, and lung tumors, can all lead to dry cough. 3. Medication-related factors: certain medications, such as ACE inhibitors used for lowering blood pressure, may cause chronic dry cough as a side effect. 4. Unhealthy lifestyle habits: for example, excessive consumption of spicy or irritating foods may also trigger dry cough. The causes of dry cough are complex and should be analyzed according to specific circumstances. It is recommended to seek timely medical attention.