While older people can experience these classic symptoms, the following symptoms may also provide important clues to possible thyroid problems.
Depression. An older person with hyperthyroidism is more likely than a younger person with the disease to develop depression.
Heart failure. The heavy burden an overactive thyroid places on the heart can lead to heart failure -- a condition where the heart cannot pump blood effectively.
Atrial fibrillation. In one study, 35 percent of older people with hyperthyroidism experienced disorganized heart rhythms.
Excessive weight loss. A younger person with hyperthyroidism may experience some weight loss, but older people tend to lose even more weight, and may even appear malnourished.
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