Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Proctitis ?
    ### Response:
    Proctitis is inflammation of the lining of the rectum, the lower end of the large intestine leading to the anus. The large intestine and anus are part of the gastrointestinal (GI) tract. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus.
    