Hypothyroidism is the disease state in humans and animals caused by insufficient production of thyroid hormone by the thyroid gland.
Syptoms:The ability of Hypothyroidism to mimic a number of medical conditions originates in the vast functions of the thyroid hormones, which are reduced or absent in this case. The functions of thyroid hormones include modulation of carbohydrate, protein and fat metabolism, vitamin utilization, mitochondrial function, digestive process, muscle and nerve activity, blood flow, oxygen utilization, hormone secretion and sexual and reproductive health to mention a few. Thus, when the thyroid hormone content gets out of balance, systems covering the whole body are affected. This is why hypothyroidism can look like other diseases. Conversely, sometimes other conditions can be mistaken for hypothyroidism.

當甲狀腺無法製造足量的甲狀腺激素供身體所需時,即稱為甲狀腺機能低下。主要原因有下列五項:
  1. 以放射碘或甲狀腺切除治療葛瑞夫茲病的後遺症。
  2. 橋本氏甲狀腺炎造成甲狀腺發炎破壞。
  3. 先天性甲狀腺缺乏~一出生即無甲狀腺。
  4. 因甲狀腺癌而接受全甲狀腺切除。
  5. 異位甲狀腺~舌甲狀腺。

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