Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Joint Disorders ?
    ### Response:
    A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including       - Arthritis - inflammation of a joint. It causes pain, stiffness, and swelling. Over time, the joint can become severely damaged.
    