Paralysis due to hyperthyroidism has a similar clinical picture to that of hypokalemic periodic paralysis, with reduced blood potassium. In contrast to periodic paralysis, hyperthyroidism-induced paralysis is more frequent but shorter in duration, often within a few hours to a day. Episodes of paralysis may cease or be significantly reduced when hyperthyroidism is controlled. In addition, paralysis caused by hyperthyroidism is accompanied by symptoms of the primary cause of hyperthyroidism such as palpitations, sweating and weight loss despite eating more.