Chronic cough is defined as a cough that lasts for eight weeks or longer in adults, or four weeks in children. It can be caused by various factors, including asthma, allergies, gastroesophageal reflux disease (GERD), or chronic bronchitis. Identifying the underlying cause is essential for effective treatment. Symptoms of chronic cough may include a persistent dry or productive cough, which can lead to discomfort, fatigue, and difficulty sleeping. Diagnosis typically involves a medical history review, physical examination, and possibly additional tests like chest X-rays or lung function tests to determine the cause and appropriate management.