TSH results may seem counterintuitive. A high TSH level suggests an underactive thyroid gland, while a low TSH levels indicate an overactive thyroid. TSH influences the production of thyroid ...

Your doctor will order a TSH test if you exhibit thyroid disorder symptoms like hair loss or fatigue. High TSH levels could be a sign of hypothyroidism while low TSH levels may signal hyperthyroidism.

Intermittent or non-compliance with levothyroxine (L-T4) replacement therapy will result in discordant serum TSH and FT4 values (high TSH/high FT4) because of a persistently unstable thyroid state ...

When TSH is unexpectedly high, ask the laboratory to re-measure the specimen diluted, preferably in thyrotoxic serum, to check for parallelism. Request that the laboratory analyze the specimen by ...