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Hyperthyroid

Another common grouping of symptoms of thyroid problems, Hyperthyroidism (thyrotoxicosis or "fast thyroid gland") is the clinical syndrome caused by an excess of circulating free thyroxine (T4) and free triiodothyronine (T3), or both. Major causes in humans are Graves' disease (the most common etiology with 70-80%), toxic thyroid adenoma, toxic multinodular goitre, and subacute thyroiditis.

signs and symptoms of hyperthyroid

Major clinical features in humans are weight loss (often accompanied by a ravenous appetite), fatigue, weakness, hyperactivity, irritability, apathy, depression, polyuria and sweating. Additionally, patients may present with a variety of symptoms such as palpitations and arrhythmias (notably atrial fibrillation), dyspnea, infertility, loss of libido, nausea, vomiting, and diarrhea. In the elderly , these classical symptoms may not be present and they may present only with fatigue and weight loss leading to apathetic hyperthyroidism.

Neurological manifestations are tremor, chorea, myopathy, and periodic paralysis. Stroke of cardioembolic origin due to coexisting atrial fibrillation may be mentioned as one of the most serious complications of hyperthyroidism.

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