What does TSH abnormal mean?

What do the results mean? High TSH levels can mean your thyroid is not making enough thyroid hormones, a condition called hypothyroidism. Low TSH levels can mean your thyroid is making too much of the hormones, a condition called hyperthyroidism.

What are symptoms of abnormal TSH?

High TSH levels indicate hypothyroidism.

  • fatigue.
  • weight gain.
  • swelling of the face and neck.
  • increased sensitivity to cold temperatures.
  • dry skin.
  • thinning hair.
  • a slow heart rate.
  • irregular or heavy menstrual periods.

What is TSH reflex on abnormal to free T4?

TSH is used as the initial screening test because it provides the best indication of physiological thyroid hormone status. Increased TSH indicates inadequate levels of thyroid hormones, and a suppressed TSH indicates excess thyroid hormone activity.

Can TSH be abnormal and T4 normal?

A normal TSH and normal T4 show a normal thyroid. A low TSH and high T4 generally means an overactive thyroid. A high TSH and low T4 means an underactive thyroid.

What is FT4 in thyroid test?

This test measures the level of free T 4, or free thyroxine, in your blood. A free T 4 test is used to find out how well your thyroid gland is working. T 4 is 1 of 2 hormones produced by the thyroid, a butterfly-shaped gland in your neck.

What is a TSH reflex T4 test?

Your doctor may order a T4 test if a thyroid-stimulating hormone (TSH) test has come back with abnormal results. A T4 test will help your doctor determine what type of problem is affecting your thyroid. Some disorders that affect thyroid function include: hyperthyroidism, or overactive thyroid.

Do I need to fast for TSH with reflex to free T4?

Is Fasting Required for a Thyroid Test? Most doctors will suggest you do not fast before your thyroid function test. Research shows that fasting, especially early in the morning, may impact TSH levels.

What if TSH is high but T3 and T4 are normal?

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.

Is TSH enough to diagnose hypothyroidism?

Research finds that a simple TSH test is enough to identify hypothyroidism in 99.6% of the tests performed. You may have heard of expanded or full thyroid panels, which often include tests for TSH, total T3, total T4, free T3, free T4, anti-TPO antibodies, thyroglobulin, and reverse T3.

What is the normal range of TSH reflex?


  • weight gain
  • swelling of the face and neck
  • increased sensitivity to cold temperatures
  • dry skin
  • thinning hair
  • a slow heart rate
  • irregular or heavy menstrual periods
  • fertility problems
  • depression
  • What does a low TSH and high T4 mean?

    What Does High FT4 and Low TSH Mean? A person who has high FT4 test results and low TSH results has hyperthyroidism, according to the American Thyroid Association. FT4 looks for thyroxine, the primary thyroid hormone. A TSH test measures the amount of thyroid stimulating hormone that the pituitary gland releases into the blood. When an

    What is TSH with reflex to TF4?

    Your thyroid gland is struggling but still able to keep up… for now .

  • The lab tests may not be accurate . This one is rare but it certainly does happen.
  • You may have Hashimoto’s Thyroiditis . Another possibility is that you have an autoimmune disease known as Hashimoto’s thyroiditis .
  • You may not be converting T4 to T3 .
  • How does TSH affect fertility?

    TSH levels actually regulate some of the key enzymes needed to make melatonin. And melatonin, in turn, increases some of the key players in thyroid hormone production. In addition to being important for thyroid function, melatonin is also essential for egg quality and fertility.