Low TSH but hypothyroidism?

summary

TSH is actually thyroid stimulating hormone, which can promote the growth of human thyroid, and also promote the completion of various functions of human thyroid. In fact, in essence, thyroid stimulating hormone is a kind of glycoprotein, which has the function of promoting the release of thyroid hormone, and can also promote the synthesis of T4 and T3 in the body, and can enhance the activity of peroxidase in the body. In addition, the total substance can also play the role of thyroid enlargement. Thyroid stimulating hormone can increase or decrease in the body for various reasons. Low TSH but hypothyroidism? Let's talk about it.

Low TSH but hypothyroidism?

1. There are many reasons that can cause the decrease of thyroid hormone. If a person has pituitary hypothyroidism, the content of thyroid stimulating hormone will decrease. Of course, if it is hyperthyroidism caused by non thyroid hormone tumor, it can also lead to the decrease of thyroid stimulating hormone. Therefore, hypothyroidism can be hyperthyroidism.

2. In fact, the reduction of thyroid stimulating hormone can also be due to the use of certain drugs, such as aspirin, or intravenous corticosteroid drugs, or intravenous heparin drugs, which may lead to the reduction of thyroid stimulating hormone.

3. We can't judge whether there is hyperthyroidism or hypothyroidism only by excessive or insufficient thyroid stimulating hormone. Because hypothyroidism or hyperthyroidism can cause this hormone to decrease. To judge hyperthyroidism, triiodothyronine and tetraiodothyronine combined with thyroid stimulating hormone should be examined.

matters needing attention

With hyperthyroidism, triiodothyronine and tetraiodothyronine will be significantly higher, and thyroid stimulating hormone (TSH) will be lower. Only in this case, the TSH is low, it can be said that hyperthyroidism.