What TSH level is considered hypothyroidism?

Normal and Abnormal TSH Ranges TSH > 4.0/mU/L with a low T4 level indicates hypothyroidism. If your TSH is > 4.0 mU/L and your T4 level is normal, this may prompt your physician to test your serum anti-thyroid peroxidase (anti-TPO) antibodies.

What is the optimal level for TSH?

The normal range of TSH levels in adults is between 0.4 to 4.0 mIU/L (milli-international units per liter). Some research suggests that this range should actually be more like 0.45 to 2.5 mIU/L.

What does a high reading of TSH mean?

High TSH levels can mean your thyroid is not making enough thyroid hormones, a condition called hypothyroidism. Low TSH levels can mean your thyroid is making too much of the hormones, a condition called hyperthyroidism.

What is borderline hyperthyroidism?

Subclinical hyperthyroidism is a condition in which you have low levels of thyroid stimulating hormone (TSH) but normal levels of T3 and T4. T4 (thyroxine) is a major hormone secreted by your thyroid gland. T3 (triiodothyronine) is a modified version of T4.

Is TSH high or low with Hashimoto’s?

A high TSH is the hallmark of hypothyroidism. But damaged thyroid tissue caused by autoimmune activity associated with chronic inflammation cannot produce enough hormones. The pituitary responds and TSH rises. Some Hashimoto’s patients have TSH levels over 100!

Can hyperthyroidism just go away?

Hyperthyroidism is treatable. Some causes may go away without treatment. Hyperthyroidism caused by Graves disease usually gets worse over time. It has many complications, some of which are severe and affect quality of life.

Should I worry about hyperthyroidism?

Living with hyperthyroidism If it is not treated, hyperthyroidism can lead to other health problems. These include: Heart problems. A rapid heart rate, a heart rhythm disorder (called atrial fibrillation), or congestive heart failure can result.

What is the normal range of TSH?

Normal TSH ranges can vary widely, depending on a person’s age, sex, and weight. Reference TSH ranges remain controversial, but for most people, the normal range falls between 0.4 and 4.0 mU/l. Having an overactive or underactive thyroid can cause health issues that interfere with a person’s daily life.

What does a high TSH level indicate?

High TSH levels indicate hypothyroidism. People develop hypothyroidism when their thyroid produces low levels of hormones. When the thyroid gland does not produce enough hormones, the pituitary gland produces more TSH to compensate. What do low levels mean? Low TSH levels indicate hyperthyroidism. This is also known as an overactive thyroid.

What is a TSH test used to diagnose?

A TSH test measures the amount of the hormone in the blood. Doctors can use the results to diagnose thyroid conditions, such as hypothyroidism and hyperthyroidism. Normal TSH ranges can vary widely, depending on a person’s age, sex, and weight.