<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been experiencing heartburn, coughing up sputum, a lump in my throat, and sharp chest pain. What could be causing these symptoms?  <response>: It sounds like you may have a stricture of the esophagus. This condition occurs when the esophagus narrows, making it difficult to swallow and causing symptoms like heartburn, coughing up sputum, a lump in the throat, and sharp chest pain. I recommend further testing to confirm the diagnosis and determine the best treatment plan for you. 