What is the reason for an elevated TSH level?

Q: When TSH increases, how does it affect our body? What are the tests required and the treatment given?

A:Most of the time high TSH denotes primary hypothyroidism meaning low thyroid hormones. Thyroid gland produces T4 and T3 hormones when these hormones are low body tries to compensate these by increasing TSH which is regulatory hormone for thyroid gland. You should undergo a clinical check up along with T4 and T3 levels to decide further course of action.