Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Constipation ?
    ### Response:
    Constipation means that a person has three or fewer bowel movements in a week. The stool can be hard and dry. Sometimes it is painful to pass. At one time or another, almost everyone gets constipated. In most cases, it lasts a short time and is not serious.
    