Up till now, changed equalization of Th1 and Th2 insusceptible cells has been hypothesized to assume a significant job in the pathogenesis of Autoimmune Thyroid Tiseases (AITD). Nonetheless, late investigations on Thyroid infections recommend another job for Th17 (T aide 17) cells that have been delegated another ancestry, particular from Th1, Th2 and T-reg cells. In spite of wide intrigue, the job of Th17 cells in the pathogenesis of fiery and immune system sicknesses is as yet being discussed. Th17 cells are engaged with invulnerable reactions against extracellular pathogens and can discharge cytokines: IL-17, IL-17F, IL-21 and IL-23. Th17 cells can be portrayed by a few surface markers, for example CCR6 (CD196), IL-23R, IL-12Rbeta2 and CD161. Immune system thyroid illnesses (AITD) are the most common organ-explicit immune system sicknesses (ADs) and influence 2 - 5% of the populace with incredible changeability between sexual orientations (i.e., ladies 5–15% and men 1–5%) . AITD incorporate Graves’ Disease (GD) and Hashimoto Thyroiditis (HT), among others. HT and GD are the significant reasons for hypothyroidism and hyperthyroidism, separately. They mirror the loss of immunological resistance and offer the nearness of cell and humoral safe reaction against antigens from the thyroid organ with receptive invasion of T cells and B cells, autoantibody age and, therefore, the advancement of clinical indications. The lymphocytic invasion causes tissue harm and changes the capacity of the thyroid organ. The injury is caused when the autoantibodies or potentially sharpened T cells respond with the thyroid cells causing the provocative response and, now and again, cell lysis. By and large, while T lymphocytes are the principle cell type invading the organ in HT, a B cell reaction prevails and decides the nearness of GD. Likewise with different ADs, there is a multifactorial etiology with a mind boggling communication of ecological factors in hereditarily powerless people. A portion of these qualities are explicit for GD and HT while others are common for the two sicknesses, which shows a hereditary inclination partook in these procedures together. Competitor qualities incorporate immunoregulators [e.g., human leukocyte antigen (HLA), cytotoxic T lymphocyte antigen-4 (CTLA-4)] and others explicit to the thyroid (e.g., TSH receptors, thyroglobulin, and so on.). The primary ecological variables are smoking, stress, and iodine utilization.