Are Very Low TSHs Dangerous?
Hello Mr Andrian. Thank you for asking at HealthReplies.com.
Hyperthyroidism is a condition in which the level of thyroid hormone in the blood increases. Thyroid hormone plays an important role in the body's metabolism, so it can cause serious disorders if the levels are excessive. The thyroid hormone in the body consists of thyroxine (T4) which can be converted into triiodotironin (T3). The entry of T4 into the organs of the body is influenced by its binding to special proteins. In the absence of binding to protein, T4 is known as free T4 (FT4). Apart from working to regulate the metabolism of the organs in the body, T4 also regulates the release of thyroid stimulating factor (TSH). TSH is a hormone that regulates the secretion of T4 by the thyroid gland. In a high T4 or FT4 state, TSH will decrease its output, so that T4 does not increase much.
In patients with hyperthyroidism we will indeed find an increased T4 or FT4 accompanied by a decreased TSH. In asymptomatic hyperthyroid patients, TSH levels usually fall without an increase in T4 or FT4. Low TSH levels in your wife may indicate that the hyperthyroidism has not been completely controlled. Hyperthyroid treatment takes a long time, which is about more than a year. Instead, you should bring these results to the doctor who handles your wife. Because, apart from laboratory results, the overall condition of the patient, including the symptoms experienced and signs that appear, also needs to be observed by the doctor. The doctor will explain the results of the physical and laboratory examinations and future treatment plans. The doctor will also rearrange the appropriate dosage for your wife's current condition. Immediately take your wife to the emergency room at the nearest hospital if you have a high fever accompanied by weakness, drowsiness, shortness of breath, or restlessness.
That's my explanation. I hope this helps.