Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Indigestion ?
    ### Response:
    Indigestion, also known as dyspepsia, is a term used to describe one or more symptoms including a feeling of fullness during a meal, uncomfortable fullness after a meal, and burning or pain in the upper abdomen.
                
Indigestion is common in adults and can occur once in a while or as often as every day.
    