Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of COPD ?
    ### Response:
    Call your doctor right away if your symptoms worsen suddenly. People with COPD may have symptoms that suddenly get worse. When this happens, you have a much harder time catching your breath. Symptoms that worsen suddenly can include sudden chest tightness, more coughing, a change in your sputum (mucus), or fever.
    