Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Indigestion ?
    ### Response:
    Nearly everyone has had indigestion at one time. It's a feeling of discomfort or a burning feeling in your upper abdomen. You may have heartburn or belch and feel bloated. You may also feel nauseated, or even throw up.    You might get indigestion from eating too much or too fast, eating high-fat foods, or eating when you're stressed.
    