Doctor insights on:
Tsh Critical Value
My tsh level is 43. I wanted to know how critical that is? I am still waiting to see the endocrinologist but my symptoms seemed to be getting worse ev
See pcp: you need the free hormones too to determine severity of hypothyroidism but in this case, you can see your primary care physician while waiting to see the endocrinologist to get treated if needed. the main thing for the endocrinologist is to find the cause for your hypothyroidism. ...Read more
Activates thyroid.: Tsh, or thyroid stimulating hormone, is a hormone made in the pituitary gland to control how much thyroid hormone is made and released into the bloodstream. High levels of TSH mean the pituitary thinks the body needs more thyroid hormone(that thyroid levels are too low), and low levels of TSH mean that the pituitary thinks the body needs less thyroid hormone. ...Read more
Depends: Are you on thyroid replacement currently? Tsh can fluctuate if you are on the wrong kind of thyroid replacement, or you are not taking it regularly, or lab misinterpretation...Work closely with your doc or see a thyroid specialist if this continues to be a problem. ...Read more
No: Tsh is produced in the anterior pituitary gland in the brain. Its function is to regulate thyroid hormone production in the thyroid gland itself. The TSH test is just to monitor that feedback loop. If there is too little thyroid hormone, then that is given exogenously because that has a physiologic function. Tsh does not. If the pituitary is treated if it's abnormally producing extra tsh. ...Read more
Typically, once the TSH starts trending up, it means your own thyroid gland is not being capable of producing enough thyroid hormone and until treated with appropriate doses of hormone, it will continue to go up. The answer to your question depends on the time in between labs, weight gain or significant weight loss, etc etc.
Any other symptoms ? ...Read more
Why is it high?: Normal TSH is usually less than 4 or 5. A primary care doctor and/or an endocrinologist can help figure out why a TSH is high. It may mean that the thyroid gland is having problems and cannot make enough thyroid hormone. A higher TSH is a stronger command from the brain, urging the thyroid gland to work harder. ...Read more
Slightly abnormal: Hi. That TSH is slightly abnormal on the suppressed (hyperthyroid) side of normal. I'd recommend repeating it in a bout 6-8 weeks (with a free T4 and free T3) and see if it ends up back in the normal range, is reproducibly suppressed to a similar level, or is becoming more suppressed (more hyperthyroid). ...Read more
Take more Synthroid (thyroxine): If you're following your tsh, i'm assuming that you have hypothyroidism on replacement therapy. The number is opposite: if you are not on enough synthroid, (thyroxine) the TSH is high. If you are on too much synthroid, (thyroxine) the TSH is low. Look at the normal range for tsh. If you feel sluggish, cold, fat, or constipated; you may need an increase in your dose (or you may need to start thyroid replacement!). ...Read more
Reference range: The lab that performed your test, if it is an accredited, high quality lab, is required to provide a reference range for each test they perform. This is the normal or expected range, and assuming you match the population they used to determine that range, it is most likely your results if normal will be inside the range. ...Read more
Usually < 5 or > 0.5: Depends on the normal range for the lab where the test was processed. If it's high or low it should be interpreted in the context of a free T4 and whether or not you have symptoms. People with a TSH that is in the normal range but above 2 may have a higher risk for developing hypothyroidism in the future. ...Read more
Mildly high: A TSH of 4.84 means that your pituitary gland is not completely happy with your thyroid level, and is trying to get your thyroid to produce more thyroid hormone. Considering your history of RA, you may also have Hashimoto's thyroiditis, which can eventually cause your thyroid to fail. You should have a free T4 level, though it is likely to still be normal. Eventually you may need thyroid hormone ...Read more
TSH: Tsh decreases in response to thyroid activity. If you're exposed to foods which suppress your thyroid and then avoid them, your thyroid function could normalize -- making your TSH decrease too. Some potentially problematic foods for thyroid include any containing bromine or bromates -- these can be found in breads, pesticides on fruits, soft drinks, etc. http://tinyurl.com/ntnqfpb. ...Read more
The range varies from one lab to another.
When/if you get thyroid labs done please make sure they share the correct reference intervals with you.
Preferably don't go from one lab to another - they are all good - just different methods. ...Read more
Many: An increased TSH means you do not have enough thyroid hormone circulating & being used. This is hypothyroidism. Symptoms are many. Tiredness, depression, dry skin, constipation, edema of legs, weight gain, deepening of voice, change in texture of hair, menstrural irregularities, decreased stamina and many many more. If this is the case, see your pcp or endocrinologist & get examined and treated. ...Read more