Doctor insights on:
Declining Tsh Levels
No: Your TSH is in the normal range. TSH or thyroid stimulating hormone is produced in a gland in the brain called the pituitary. TSH will rise in response to low thyroid hormone levels in the bloodstream. A TSH in the normal range means that you have sufficient thyroid hormone production.
What could cause a TSH to drop from 25 to 3.1 in less than 2 weeks. Doctors retested after worsening symptoms. Can TSH levels fluctuate that much?
Yes: Peptide hormones like TSH have short half lives measured in minutes. Adequate treatment with replacement thyroxine would cause TSH to drop rapidly.
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.See 1 more doctor answer
Depends on lab, but: Depends alot on the lab you use: most run roughly from 0.3 to about 5.0. But - this is important - most endocrinologists now consider anything above (roughly) 2.0-2.5 to be elevated, meaning an under-active thyroid. See your doctor for more specifics.
Over 99% of the tine the cause is hypothyroidism, which itself has many causes, as mentioned by Dr. Kaur.
I advise everyone with hypothyroidism to ask their doctor to test them for thyroiditis, as most will have this and treatment is a bit different from plain hypothyroidism.
Another cause can be a pituitary gland tumor. Most pituitary tumors are benign.
0.5 - 5.0: In general, people with no known thyroid conditions will have TSH values between 0.5 and 5.0. Each lab determines its own normal range, and the lower limit can range from 0.2 - 0.6, and the upper limit from 2.5 to 6.0. There are some doctors who feel that the upper limit of normal is too high and that treatment should be considered for anyone with symptoms and TSH over 2.5 to 3.0.
Thyroid lab tests: Tsh levels decrease as the free thyroid hormone levels in the blood increase. So if you develop an overactive thyroid gland and produce excessive thyroid hormone your TSH level will drop low. The same can occur if you are taking a thyroid hormone supplement for hypothyroidism and are taking more than what your body needs.
Depends: Some doctors consider 2 to be getting high. But really it is the balance of T3 (liothyronine) to reverse T3 (liothyronine) that matters. T4 is converted to both T3 (liothyronine) and rt3, and T3 (liothyronine) is like the gas while rt3 is like the brakes. Tsh does not reflect this balance and cannot be used in isolation to uncover thyroid problems.See 2 more doctor answers
TSH Level: Tsh level (thyroid stimulating hormone level) has a big range, and may vary in different laboratories range of TSH in diagnostic laboratory services of hawaii is: 0.27----4.20 please see your physician for medical examination including thyroid status, assessment of anxiety and depression, follow up of TSH level, and for needed treatment.See 1 more doctor answer
Huh?: Question does not make sense as TSH level that high is associated with symptoms that would render you incapable of typing the question. There is more to your story.
Yes, becuase...: A high TSH is considered a sign of hypothyroidism, in fact many specialists feel any TSH above 3 is cause for concern. The important question is your level of thyroid hormones (esp. Free t3) ; if you have any symptoms of hypothyroidism- see http://bit. Ly/14aneey if your levels are fine ; you have no symptoms you may not need treatment but this should be monitored as you are at risk- see comment:.
Normal range: Your TSH level is in the normal range. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that.