Below is an instruction from Human. Write a response.
    ### Instruction:
    What to do for Crohn's Disease ?
    ### Response:
    - Crohn's disease is a chronic, or long lasting, disease that causes inflammationirritation or swellingin the gastrointestinal (GI) tract.  - The exact cause of Crohn's disease is unknown. Researchers believe that factors such as an autoimmune reaction, genes, and environment may play a role in causing Crohn's disease.
    