This is a test of commonsense. Complete the next sentence:

How to recognize the signs of graves' disease
Pay attention to irritability.
Because this condition can throw your hormone levels out of balance, you may feel cranky or even more anxious than usual. You may also suffer from insomnia.
Of course, just feeling irritable doesn't mean you have graves' disease. However, if you are chronically feeling out-of-sorts and anxious and are having other symptoms, you should visit your doctor.