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Doctor insights on: Hypothyroidism Blood Test Do I Need To Fast

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I have all symptoms of hypothyroidism, but blood tests are normal. plus a swollen thyroid left side. What can cause this? Hair is really falling out.

I have all symptoms of hypothyroidism, but blood tests are normal. plus a swollen thyroid left side. What can cause this? Hair is really falling out.

Other possibilities.: The Thyroid is not the only endocrine gland that affects metabolism, mood, menstrual cycles and hair follicle activity in women your age. It's quite possible that you are experiencing peri-menopause, or that you have Vitamin D deficiency. Has the enlargement of the thyroid gland been confirmed/examined with ultrasound? If not it should be. Your other hormones and a D level should be checked also. ...Read more

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Dr. Su Fairchild
1,203 doctors shared insights

Hypothyroidism (Definition)

The thyroid gland is an endocrine organ located in the front part of the neck. Its role is to make thyroid hormones, which control the way cells use energy. Hyperthyroidism results when the thyroid gland is overactive and too much thyroid hormone is produced, which speeds up metabolism. This results in weight loss, a quick heartbeat, sweating, nervousness, ...Read more


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What's the best blood test to get for hypothyroidism?

TSH: Generally, your doctor will order a TSH, and perhaps also T4 and T3 (liothyronine) levels. This is usually sufficient to get an answer for hypothyroidism, though additional tests may be necessary. ...Read more

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Will a fasting blood test tell if I have hypothyroidism?

Will a fasting blood test tell if I have hypothyroidism?

Yes it will: To diagnose Hypothyroidism you do not have to fast,but if your blood was collected while fasting for some other reason it is ok/And will tell if you have Hypothyroidism as long as you are tested for it.You need T3T4FreeT4 and TSH level done on fasting or non fasting specimen ...Read more

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What to do if I have all the symptoms of hypothyroidism, but had a 'normal' blood test?

What to do if I have all the symptoms of hypothyroidism, but had a 'normal' blood test?

TSH: If you have symptoms but you had a TSH that was normal, it is most likely something else. This test is very easy to do and quite specific . Ask you doctor to review the test with you and then go over your symptoms again. Many problems can masquerade as something else. ...Read more

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I took my hypothyroidism medication while fasting for a blood test, would that make my levels good resulting in being taken off?

I took my hypothyroidism medication while fasting for a blood test, would that make my levels good resulting in being taken off?

No: In fact, it may even raise your blood cholesterol level. Why you would want to skip an important medication to scam on a test results is beyond me however. ...Read more

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Could a thyroid blood test miss a hypothyroid issue?

Could a thyroid blood test miss a hypothyroid issue?

Yes: There are several parts to a thyroid blood test. Often only 1 part is used, called a TSH (thyroid stimulating hormone.) if it is high normal and a person has symptoms of low thyroid, like depression, weight gain, intolerance to cold, the practitioner often gets a different test, a free circulating thyroid hormone. When it's all borderline it is often worth a trial of low dose thyroid replacement. ...Read more

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What is best time to take blood test for hypothyroid. with fasting/ any time of day/before having pills in the morning?

What is best time to take blood test for hypothyroid. with fasting/ any time of day/before having pills in the morning?

Any time: Blood for thyroid test can be taken any time. However, if you need to have blood tested in fasting state for other reasons, a sample for thyroid function tests can be collected at the same time. ...Read more

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Earlier today when at Dr for hypothyroid blood test, BP was 94 over 68. Then tonight it was 127 over 86 w/home kit (took 2x). Should I be concerned?

Earlier today when at Dr for hypothyroid blood test, BP was 94 over 68. Then tonight it was 127 over 86 w/home kit (took 2x). Should I be concerned?

No: Those are all normal BP readings. Your home kit may not be as accurate, blood pressure changes throughout the day. Next time you go to the doctor, take your kit and calibrate it against the doctors. Relax and have a great evening. ...Read more

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What can affect a T4 blood test to be diagnosed as having hypothyroidism?

What can affect a T4 blood test to be diagnosed as having hypothyroidism?

Many Things: Pregnancy, use of birth control or estrogen pills if female, testosterone levels if male, liver disease, kidney disease, and nutritional status can all affect levels of thyroid binding proteins, and the level of total T4 needed to maintain the free T4 in the desired range. While free T4 is a better reflection of thyroid status than total t4, the TSH level is best at measuring what's right for you. ...Read more

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