Aunt Li, 68, has been coughing and expectorating repeatedly for more than half a year. At the beginning, she coughed slightly. She thought it was a common cold, so she bought cough syrup at the drugstore, but the effect was not good. Later, I added other cough drugs and even tried many “folk prescriptions”, but the cough became more and more serious. Until nearly two weeks, it has seriously affected daily life. She couldn’t sleep well at night. Helpless, Aunt Li came to the outpatient departm...