There are many reasons for persistent dry cough. It is common in the following situations: a long-term smoker may have a long-term dry cough. The tar and nicotine in tobacco repeatedly stimulate the airway, causing damage to the bronchial mucosa, thus causing dry cough. 2. Patients with chronic bronchitis chronic obstructive pulmonary disease may suffer from chronic dry cough. Third, patients with cough variant asthma will also have symptoms of long-term dry cough, mostly due to exposure to allergens, cold air, animal hair, dust and other factors. Keep away from allergens, or use antiallergic drugs for treatment, dry cough symptoms will be relieved. 4. Patients with lung tumors may also have a long-term dry cough. Patients with long-term dry cough should go to the hospital for relevant examination, and give symptomatic treatment after identifying the cause.
