Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose What I need to know about Crohn's Disease ?
    ### Response:
    A doctor will perform a physical exam and tests to diagnose Crohns disease. During your visit, the doctor will ask about your symptoms and medical history.
                
The doctor may order blood tests, which involve drawing blood at a health care providers office or commercial facility and sending the sample to a lab for analysis.
    