Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Hypersensitivity Pneumonitis ?
    ### Response:
    To diagnose hypersensitivity pneumonitis (HP), your doctor must pinpoint the antigen that's causing the disease and its source. (An antigen is a substance that your body reacts against, such as molds, dusts, and chemicals.)
                
Your doctor will ask you detailed questions about:

    