Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Breathing Problems ?
    ### Response:
    When you're short of breath, it's hard or uncomfortable for you to take in the oxygen your body needs. You may feel as if you're not getting enough air. Sometimes mild breathing problems are from a stuffy nose or hard exercise. But shortness of breath can also be a sign of a serious disease.
    