Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Adrenal Insufficiency and Addison's Disease ?
    ### Response:
    A lack of CRH or ACTH causes secondary adrenal insufficiency. The lack of these hormones in the body can be traced to several possible sources.
                
Stoppage of Corticosteroid Medication
                
A temporary form of secondary adrenal insufficiency may occur when a person who has been taking a synthetic glucocorticoid hormone, called a corticosteroid, for a long time stops taking the medication.
    