Hyperthyroidism, commonly known as “hyperthyroidism”, is a condition in which the thyroid gland becomes overactive. The condition occurs when the thyroid gland produces too many hormones, resulting in a rapid metabolic rate. Various body reactions are accelerated. As a result, the patient may feel excessive food, hunger, weight loss, panic, increased sweating, insomnia, and fatigue. It is also an endocrine disorder and can be associated with endocrine disorders. Women may experience menopause or reduced menstruation. Patients with goiter or goitre will become thick in the neck, and in a few cases patients will have protruding eyes, blurred vision or symptoms of diplopia. In severe cases, it can cause life-threatening heart enlargement and heart failure.