TSH & free T4 came back normal but have symptoms of thyroid problems

[drotherside]

TSH - 3.76
Free T4 - 1.20

Symptoms:
-mood swings
-always nervous
-can't put on weight (fat or muscle - I'm 6' and 135)
-always thirsty with dry mouth (I drink about 128oz water per day)
-shaky hands

My vitals are normal. What do you think could be causing this?

[drotherside]

The reference range for the FT4 is 0.76-1.46 ng/dl.

I'll get back to you with the cause of the family's thyroid issues.

[goolarra]

Recommended reference range for TSH according to AACE is currently 0.3-3.0.  Your TSH is a bit high, which indicates hypOthyroidism.  I should have asked you for a reference range on your FT4.  Ranges vary lab to lab so have to come from your own lab report.  However, given a "usual;" range of something like 0.8-1.8, yours looks pretty good...a tad low, perhaps since target for FT4 is midrange.

The really puzzling part is that your symptoms all sound hypERthyroid.

Do you know the causes of your relatives' thyroid problems?  Do they have Hashimoto's thyroiditis or Graves' disease, both autoimmune thyroid diseases that tend to run in families?

[drotherside]

I am not on any thyroid medications.

I have not been diagnosed with a thyroid disease.

My sister has hypothyroidism. My aunt & grandmother also have a thyroid disease (not sure if hypo or hyper).

[goolarra]

Are you on thyroid meds?

Have you been diagnosed with a thyroid disease or disorder?