It is a rare, potentially life-threatening complication resulting from untreated thyrotoxicosis triggered by stress, trauma, or infections. A thyroid storm is characterised by high fever, tachycardia, agitation, profuse sweating, vomiting, diarrhoea, and coma. It requires immediate, intensive medical attention; otherwise, it can eventually cause acute heart failure, atrial fibrillation, pleural effusion, and osteoporosis.