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TSH Ultra Sensitive Test Explained

Learn what the TSH Ultra Sensitive test measures, why it’s used to assess thyroid function, and how it helps detect conditions like hypothyroidism and hyperthyroidism with high precision.

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Written by Dr. Mohammed Kamran

Reviewed by Dr. Md Yusuf Shareef MBBS

Last updated on 31st Jul, 2025

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TSH Ultra Sensitive Test Explained

Introduction

If you’ve been advised to take a TSH Ultra Sensitive Test, you might be wondering what it is, why it’s needed, and what the results mean. Don’t worry—this guide will explain everything in simple terms so you can understand your thyroid health better.

What is the TSH Ultra Sensitive Test?

The Thyroid-Stimulating Hormone (TSH) Ultra Sensitive Test is a blood test that measures the level of TSH in your body with high precision. TSH is a hormone produced by the pituitary gland (a small gland in your brain) that controls how your thyroid gland functions.

Your thyroid gland plays a crucial role in regulating:

  • Metabolism (how your body uses energy)
  • Heart rate
  • Body temperature
  • Mood and energy levels

The "ultra-sensitive" version of this test detects even tiny changes in TSH levels, making it more accurate than a standard TSH test.

Why is the TSH Ultra Sensitive Test Done?

Doctors recommend this test to:

  • Check for thyroid disorders (like hypothyroidism or hyperthyroidism)
  • Monitor thyroid treatment (if you’re taking thyroid medications)
  • Evaluate symptoms like fatigue, weight changes, or mood swings
  • Screen for thyroid problems in newborns or pregnant women

Common Symptoms That May Require a TSH Test

Here are some of the symptoms that you should watch out for:

1. Symptoms of Low TSH (Hyperthyroidism – Overactive Thyroid)

  • Weight loss despite eating normally
  • Fast or irregular heartbeat
  • Anxiety, irritability, or nervousness
  • Sweating more than usual
  • Tremors (shaky hands)
  • Difficulty sleeping

2. Symptoms of High TSH (Hypothyroidism – Underactive Thyroid)

  • Weight gain without diet changes
  • Feeling tired all the time
  • Dry skin and hair loss
  • Feeling cold often
  • Depression or low mood
  • Constipation

If you experience any of these symptoms,

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Dr. M L Ezhilarasan

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Visakhapatnam

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Dr D M Karthik, General Practitioner

Dr D M Karthik

General Practitioner

4 Years • MBBS, Fellowship in Diabetes Mellitus, Advance certificate in Diabetes Mellitus, Derma Nutrition Certification

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

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Dr. Jawwad Mohammed Kaleem, General Practitioner

Dr. Jawwad Mohammed Kaleem

General Practitioner

4 Years • MBBS

Hyderabad

Apollo 24|7 Clinic, Hyderabad

540

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Dr. Chaithra H, General Physician/ Internal Medicine Specialist

Dr. Chaithra H

General Physician/ Internal Medicine Specialist

6 Years • MBBS, MD General Medicine, DNB General Medicine

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

699

69 Cashback

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Dr. Suraja Nutulapati, General Physician/ Internal Medicine Specialist

Dr. Suraja Nutulapati

General Physician/ Internal Medicine Specialist

10 Years • MBBS, MD (Internal Medicine)

Hyderabad

Apollo 24|7 Clinic, Hyderabad

recommendation

90%

(925+ Patients)

726

How is the TSH Ultra Sensitive Test Done?

  • This is a simple blood test where a small sample is taken from your arm.
  • No fasting is usually required.
  • No special preparation is needed unless your doctor advises otherwise.
  • Results are typically available within 24-48 hours.

Understanding Your TSH Test Results

TSH levels are measured in micro-international units per millilitre (µIU/mL). Here’s what your results may indicate:

TSH Level (µIU/mL)

What It Means

0.4 – 4.0

Normal range (indicates healthy thyroid function)

Below 0.4

Possible hyperthyroidism (overactive thyroid)

Above 4.0

Possible hypothyroidism (underactive thyroid)

Note: Normal ranges may vary slightly between labs. Always discuss your results with a doctor.

Get Your TSH Levels Checked Here

What Affects TSH Levels?

Several factors can influence your TSH levels, including:

  • Thyroid medications (like levothyroxine)
  • Pregnancy (TSH levels change during pregnancy)
  • Age (older adults may have slightly higher TSH)
  • Other illnesses or infections
  • Stress or extreme dieting

How to Manage Abnormal TSH Levels?

If TSH is High (Hypothyroidism):

  • Your doctor may prescribe thyroid hormone replacement.
  • Eat a balanced diet with iodine-rich foods like seafood, dairy, eggs.
  • Exercise regularly to boost metabolism.
  • Get enough sleep and manage stress.

If TSH is Low (Hyperthyroidism)

  • Treatment may include anti-thyroid medications, radioactive iodine therapy, or surgery in severe cases.
  • Avoid excess caffeine and stress, as they can worsen symptoms.
  • Eat calcium and vitamin D-rich foods to support bone health.

When to See a Doctor?

If your TSH test results are abnormal, your doctor may recommend:

  • Further tests (like Free T3, Free T4, or thyroid antibodies)
  • Medication adjustments if you’re already on thyroid treatment
  • Lifestyle changes to improve thyroid function

Book a TSH Test with Apollo 24|7

Worried about your thyroid health? Apollo 24|7 makes it easy to get tested from the comfort of your home or at a nearby lab.

Conclusion

Thyroid disorders are common but manageable. A TSH Ultra Sensitive Test helps detect problems early so you can take the right steps toward better health. If you’re experiencing symptoms like fatigue, weight changes, or mood swings, don’t ignore them—get tested and consult a doctor.


Consult Top Physicians

IMAGE
Dr. M L Ezhilarasan, General Practitioner

Dr. M L Ezhilarasan

General Practitioner

6 Years • MBBS

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

605

IMAGE
Dr D M Karthik, General Practitioner

Dr D M Karthik

General Practitioner

4 Years • MBBS, Fellowship in Diabetes Mellitus, Advance certificate in Diabetes Mellitus, Derma Nutrition Certification

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

469

IMAGE
Dr. Jawwad Mohammed Kaleem, General Practitioner

Dr. Jawwad Mohammed Kaleem

General Practitioner

4 Years • MBBS

Hyderabad

Apollo 24|7 Clinic, Hyderabad

540

IMAGE
Dr. Chaithra H, General Physician/ Internal Medicine Specialist

Dr. Chaithra H

General Physician/ Internal Medicine Specialist

6 Years • MBBS, MD General Medicine, DNB General Medicine

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

699

69 Cashback

IMAGE
Dr. Suraja Nutulapati, General Physician/ Internal Medicine Specialist

Dr. Suraja Nutulapati

General Physician/ Internal Medicine Specialist

10 Years • MBBS, MD (Internal Medicine)

Hyderabad

Apollo 24|7 Clinic, Hyderabad

recommendation

90%

(925+ Patients)

726


 

Consult Top Physicians

IMAGE
Dr. M L Ezhilarasan, General Practitioner

Dr. M L Ezhilarasan

General Practitioner

6 Years • MBBS

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

605

IMAGE
Dr D M Karthik, General Practitioner

Dr D M Karthik

General Practitioner

4 Years • MBBS, Fellowship in Diabetes Mellitus, Advance certificate in Diabetes Mellitus, Derma Nutrition Certification

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

469

IMAGE
Dr. Jawwad Mohammed Kaleem, General Practitioner

Dr. Jawwad Mohammed Kaleem

General Practitioner

4 Years • MBBS

Hyderabad

Apollo 24|7 Clinic, Hyderabad

540

IMAGE
Dr. Chaithra H, General Physician/ Internal Medicine Specialist

Dr. Chaithra H

General Physician/ Internal Medicine Specialist

6 Years • MBBS, MD General Medicine, DNB General Medicine

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

699

69 Cashback

IMAGE
Dr. Suraja Nutulapati, General Physician/ Internal Medicine Specialist

Dr. Suraja Nutulapati

General Physician/ Internal Medicine Specialist

10 Years • MBBS, MD (Internal Medicine)

Hyderabad

Apollo 24|7 Clinic, Hyderabad

recommendation

90%

(925+ Patients)

726

Consult Top Physicians

IMAGE
Dr. M L Ezhilarasan, General Practitioner

Dr. M L Ezhilarasan

General Practitioner

6 Years • MBBS

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

605

IMAGE
Dr D M Karthik, General Practitioner

Dr D M Karthik

General Practitioner

4 Years • MBBS, Fellowship in Diabetes Mellitus, Advance certificate in Diabetes Mellitus, Derma Nutrition Certification

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

469

IMAGE
Dr. Jawwad Mohammed Kaleem, General Practitioner

Dr. Jawwad Mohammed Kaleem

General Practitioner

4 Years • MBBS

Hyderabad

Apollo 24|7 Clinic, Hyderabad

540

IMAGE
Dr. Chaithra H, General Physician/ Internal Medicine Specialist

Dr. Chaithra H

General Physician/ Internal Medicine Specialist

6 Years • MBBS, MD General Medicine, DNB General Medicine

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

699

69 Cashback

IMAGE
Dr. Suraja Nutulapati, General Physician/ Internal Medicine Specialist

Dr. Suraja Nutulapati

General Physician/ Internal Medicine Specialist

10 Years • MBBS, MD (Internal Medicine)

Hyderabad

Apollo 24|7 Clinic, Hyderabad

recommendation

90%

(925+ Patients)

726

Get Your TSH Levels Checked Here

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