<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I??e been experiencing some symptoms lately. I have coryza, chest tightness, sharp chest pain, and difficulty breathing. What could be the cause of these symptoms?  <response>: It sounds like you might be suffering from Chronic Obstructive Pulmonary Disease COPD. This condition is usually caused by long-term exposure to irritants that damage your lungs, such as cigarette smoke or air pollution. 