Most cases of hypothyroidism
are usually accompanied by an increase in the bulk of the thyroid known as goitre. Get a USG Neck to check if there has been any increase in size of your thyroid gland or the formation of nodules. Considering your age, I hope that in the past: iodine deficiency
, physiological goitre, autoimmune thyroiditis
and pituitary problems have been ruled out It is important to differentiate primary from secondary hypothyroidism. I do not know if you have any other signs or symptoms. Excessive thyroid hormone replacement
) can also lead to low TSH levels. Get a complete Thyroid Profile done including T3, T4, TSH, Free T3 & T4, ultra TSH and Thyroid Antibody levels and post all your results.