**9. Conclusion**

Thyrotoxicosis is a very common clinical syndrome caused by an excess of thyroid hormones in the serum. Graves' Disease is the commonest cause of hyperthyroidism. Graves' Disease is the commonest cause of hyperthyroidism. It has multiple manifestations and it requires appropriate diagnostic and therapeutic management. There are three effective treatment options: RAI therapy, ATDs, or thyroidectomy. RAI treatment has been used to treat thyroid disorders, both malignant and benign, for many decades and in many cases it is preferred first- line treatment. In Graves' Disease radioiodine radiates and therefore destroys the follicle cells of the hyperfunctioning thyroid gland providing a definite therapy of hyperthyroidism as well as improving patient's quality of life. It is well tolerated with rare complications except for those related to orbitopathy.
