A persistent dry cough lasting several months may be due to allergic or seasonal asthma or environmental irritants. It is advisable to undergo a pulmonary function test (PFT) to rule out asthma or other airway disorders. If asthma is confirmed, your doctor may prescribe inhaled corticosteroids or bronchodilators to help control symptoms. Maintaining good hydration and avoiding exposure to allergens, dust, or smoke can also help reduce coughing episodes. If symptoms persist, consult a respiratory specialist for further evaluation and appropriate management.