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Added: Nov 01, 2008
Thyroid disease can cause many symptoms. The symptoms depend on whether your thyroid is hyperactive, or under active. Hypothyroidism, an underactive thyroid causes fatigue, weight gain, brittle nails, and constipation. Hyperthyroidism, an overactive thyroid causes weight loss, nervousness, and rapid heart beat. Thyroid disease can also cause infertility, and miscarriages.
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