Reviewing TSH Levels: What Is Normal?

There are all sorts of factors that are used as markers to indicate your thyroid health. One of these factors concerns the TSH levels in your blood. By looking at results from a simple blood test, a doctor can determine if you suffer from hypothyroidism or hyperthyroidism. In fact, using these levels is an ideal way to not only understand your thyroid health but to also determine the most ideal treatment option.

What Is TSH?

model of thyroid gland

TSH, which stands for thyroid stimulating hormone, is a hormone that is produced by the pituitary gland. TSH stimulates the production of triiodothyronine (T3) and thyroxine (T4), which are produced by the thyroid gland.

In the pituitary gland, another hormone, known as thyrotropin-releasing hormone (TRH), stimulates the release of TSH. As TSH goes into the thyroid, the levels are dictated by T3 and T4 levels in your blood.

The Link Between T3, T4, and TSH

If your body has low levels of T3 and T4, more TSH is produced in order to stimulate the thyroid. On the other hand, when T3 and T4 level are high, the body produces less TSH.

While TSH levels are heavily dependent on T3 and T4 levels, there are other factors that have an influence, including:

  • Genetics
  • Iodine deficiency or excess
  • Pregnancy
  • Medications
  • Inflammation of the thyroid gland
  • Thyroid cancer

Because TSH is symbiotic with thyroid hormones, TSH levels are often observed as a way to determine your thyroid health. Low TSH and T3/T4 levels often indicate hypothyroidism, while low TSH levels and high T3/T4 levels are signs of an overactive thyroid.

Understanding TSH Levels

In adults, the average TSH level ranges from 0.4 to 4.0 mIU/L. Ideal levels are below 2.5, and anything above 2.5 is considered at-risk. Levels above 4.0 mIU/L are a good indication of an underactive thyroid gland, also known as hypothyroidism. For levels below 0.4 mIU/L, chances are that the thyroid is overactive—also known as hyperthyroidism.

Unless you’re already scheduled for a blood test, chances are you won’t know that your TSH levels are potentially imbalanced. This means that it’s crucial to understand the symptoms of hypothyroidism as well as hyperthyroidism.

Common symptoms of hypothyroidism include weight gain, fatigue, weakness, dry skin, hair loss, and irritability. Hyperthyroidism causes symptoms, including appetite changes, fatigue, difficulty sleeping, and increased sweating.

Treatment for TSH Level Imbalances

Treatment for TSH level imbalances requires properly treating the underlying thyroid condition. If you experience any of the symptoms above, it’s important to seek medical attention to receive the treatment you need.

For most patients, medication is useful in balancing thyroid hormone levels. For others, surgery may be required to remove a part of the gland.

Professional Thyroid Treatment

thyroid doctor speaking with colleagues

Do you suffer from the symptoms of hypothyroidism or hyperthyroidism? If so, make today the day you take charge of your health.

At the Surgery Group of LA, our doctors are experienced in diagnosing and treating thyroid conditions. Call our office today at (310) 289-1518 to schedule an appointment and to get your thyroid health back to optimal levels.

Request An Appointment

Fill out the below short form and we’ll contact you to finalize your appointment.

What Sets Us Apart

  • Team Of Board-Certified Specialists
  • Providing Personalized & Innovative Surgical Care
  • Utilizing The Latest & Most Advanced Surgical Techniques
  • Offering Long-Term Patient Follow-Up & Direct Physician Access

Rate Us