Other important common causes are toxic nodular goitre, thyroiditis, iodine induced, drug induced or factitious ingestion of excess thyroid hormones.2 Inadequate treatment of maternal hyperthyroidism is associated with prematurity, low birth weight, and stillbirths.3 Hyperthyroidism clinically present as hyperactivity, irritability, heat intolerance, sweating, weight loss with increased appetite, tachycardia, goitre, lid lag, muscle weakness.2 The gene discussed is TG; the disease is toxic multinodular goitre.