Hyperthyroidism is not a potassium deficiency. Hyperthyroidism, the full name of which is hyperthyroidism, is a hypermetabolic syndrome caused by high concentrations of thyroid hormones for various reasons. The causes of hyperthyroidism can be secondary hyperthyroidism due to hypothalamic and pituitary diseases, overproduction of thyroid hormones due to lesions of the thyroid gland itself, and thyroid hyperthyroidism, or transient hyperthyroidism that occurs in the course of inflammation of the thyroid gland. In addition to the typical hypermetabolic syndrome, patients with hyperthyroidism can also present with potassium deficiency, also known as hypokalemic paralysis. Hypokalemic paralysis is most common in young male hyperthyroid patients. When there are triggers such as alcohol consumption, infection, fluid infusion, and large amount of carbohydrate intake, symptoms such as muscle weakness and episodic flaccid paralysis of the limbs, which are also known as hypokalemic paralysis, or symptoms of potassium deficiency, can occur. However, although hyperthyroidism can cause potassium deficiency, hyperthyroidism is not caused by potassium deficiency.