What does high T3 and low TSH mean?
A low level of TSH and high levels of T3 and/or T4 usually means you have an overactive thyroid. Doctors may refer to these measurements as “free” T3 and T4 (FT3 and FT4).
Why would free T3 be high?
If your results show high total T3 levels or high free T3 levels, it may mean you have hyperthyroidism. Low T3 levels may mean you have hypothyroidism, a condition in which your body doesn’t make enough thyroid hormone. T3 test results are often compared with T4 and TSH test results to help diagnose thyroid disease.
What does it mean if TSH is normal but T3 is high?
When the thyroid gland becomes inefficient such as in early hypothyroidism, the TSH becomes elevated even though the T4 and T3 may still be within the “normal” range.
What are the symptoms of high free T3?
Other possible symptoms include:
- weakness and fatigue.
- difficulty sleeping.
- increased sensitivity to heat or cold.
- weight loss or gain.
- dry or puffy skin.
- dry, irritated, puffy, or bulging eyes.
- hair loss.
- hand tremors.
Why is my TSH low but my T3 and T4 are normal?
Subclinical hyperthyroidism is when you have low levels of TSH but have normal levels of T3 and T4. If you’re experiencing symptoms of subclinical hyperthyroidism, your doctor can use a series of blood tests to come to a diagnosis.
What happens if free T3 is too high?
What is T3? T3 is a vital hormone; it controls your metabolism, body temperature, and heart rate. But there can be too much of a good thing. High T3 levels may increase your risk for pregnancy complications, liver disease, and may even reduce your sex drive.
What is a normal T3 level for a woman?
Normal range: 100 – 200 ng/dL (nanograms per deciliter of blood). FT3: Free T3 or free triiodothyronine is a method of measuring T3 that eliminates the effect of proteins that naturally bind T3 and may prevent accurate measurement. Normal range: 2.3 – 4.1 pg/mL (picograms per milliliter of blood)
What is a normal free T3 level?
FT3: Free T3 or free triiodothyronine is a method of measuring T3 that eliminates the effect of proteins that naturally bind T3 and may prevent accurate measurement. Normal range: 2.3 – 4.1 pg/mL (picograms per milliliter of blood)
What is a critical TSH level?
The standard reference range for the TSH level is anywhere between 0.30 and 5.0 uIU/mL. If your TSH level is higher than 5.0 uIU/mL, then the lab will flag you as “high,” and you may experience the symptoms listed above 5.0 uIU/mL. Values of the TSH level more than 10.0 uIU/mL need long-term thyroid supplements.
What does it mean if your TSH is elevated?
Elevated levels of TSH in the blood stream normally signify that the thyroid is underperforming. Elevated TSH levels are a typical signal of hypothyroidism that will need medical treatment to prevent possible health dangers.
Why is my TSH so high?
A high level of TSH is an important indication of malfunctioning of thyroid gland. This also indicates that there may be problems with the pituitary gland. Other factors that may cause high levels of TSH in the body are surgery, medication and tumor of the pituitary gland.
What are the symptoms of high TSH?
The list of common symptoms of high TSH levels includes weakness, fatigue, difficulty waking up, difficulty losing weight and/or weight gain, roughening of the hair and skin, hair loss, a pale or yellow tinge to skin, brittle nails, intolerance to cold, constipation, depression, mood swings, abnormal menstruation, decreased sex drive and memory loss.
What causes low TSH levels?
Causes. Low TSH is caused by conditions that increase thyroxine production such as Graves’ disease, thyroiditis, and thyroid nodules, which are benign tumors symptomatic of Plummer’s disease and goiter.