Do you have any other symptoms from your cough? Are you
doing exercise? Asthma can present with cough, shortness of breath, wheezing and chest tightness, any of which can be brought on by various triggers, such as exercise, allergies, cold air, strong emotions.
Another common cause of cough is GERD. Do you have any symptoms of reflux, such as heart burn? For some individuals their only symptom is a cough, triggered by the stomach contents making it's way into the esophagus.