25y/o male w/prolactinoma.thyroid bloodwork normal.doc says thyroid slightly swollen. body temp 97.5 oral/feel cold a lot. how is hypothyroid diagnose?

Thyroid prolactin: Hypothyroid is diagnosed with thyroid blood tests. You would expect an elevated TSH and a low free t4. There is an interaction between thyroid and prolactin. If you are hypothyroid and have an elevated tsh, this will raise the prolactin; correcting the thyroid will normalize the prolactin. But this may not apply to you. The "swollen thyroid" may be separate. See your endocrinologist.