Answer:
Ellie's problem is probably being caused by Grave's disease.
Step-by-step explanation:
Graves Disease is an autoimmune disease, that is, caused by a defect in the immune system that leads to inflammation of the thyroid by the autoantibodies themselves, defense proteins that exist to protect our body from infections and aggressors. The result is that the thyroid begins to secrete more hormone than it should, causing some problems to the body.