The pathophysiology of Graves’ disease

A female client has been on a protein-free diet for 3 months. She comes to the clinic with reports of restlessness, heat intolerance, diarrhea, and a
significant increase in appetite. Further questioning of the client reveals that she had been diagnosed with hyperthyroidism several years prior, but she had
stopped her medication about 6 months ago because she felt so much better. Describe the pathophysiology of Graves’ disease? What is a potentially lifethreatening complication associated with hyperthyroidism? What are possible causes for the complication identified?