Tiredness, weight changes, temperature sensitivity and palpitations can sometimes be associated with thyroid problems. These symptoms can also occur for many other reasons, which is why thyroid testing is most useful when considered alongside a full clinical assessment rather than in isolation.
Thyroid problems occur when the thyroid gland produces too little or too much hormone, or when there is another problem affecting the gland. Understanding the difference between these conditions helps clarify which symptoms to watch for and when a GP review may be appropriate.
Key Takeaways
- Thyroid hormones help regulate metabolism, body temperature and heart rate.
- Hypothyroidism means the thyroid produces too little hormone.
- Hyperthyroidism means the thyroid produces too much hormone.
- Symptoms of thyroid problems overlap with many other conditions.
- TSH is usually the first blood test used to assess thyroid function.
- One mildly abnormal result does not always confirm a thyroid condition.
- A GP can assess symptoms, arrange testing and refer where needed.
What Are Thyroid Problems?
The thyroid is a small gland in the front of the neck. It produces hormones that help regulate metabolism, energy, temperature, heart rate and other body functions. Healthdirect Australia explains that thyroid disease can involve the gland producing too little or too much hormone, or structural problems such as inflammation, nodules or enlargement.
The two most common functional thyroid problems are hypothyroidism (underactive thyroid) and hyperthyroidism (overactive thyroid). Both can cause noticeable symptoms, but those symptoms are often non-specific and can have other explanations.
What Are the Symptoms of Thyroid Problems?
Symptoms vary depending on whether the thyroid is underactive or overactive. Symptoms may develop gradually, so changes can be difficult to notice at first.
Underactive Thyroid (Hypothyroidism) Symptoms
- Persistent tiredness or low energy
- Feeling unusually cold
- Unexplained weight gain
- Constipation
- Dry skin or hair changes
- Poor concentration or slow thinking
- Low mood
- Menstrual changes
Overactive Thyroid (Hyperthyroidism) Symptoms
- Unexplained weight loss
- Feeling unusually hot or sweating
- Palpitations or faster heartbeat
- Tremor or shakiness
- Anxiety or restlessness
- Difficulty sleeping
- Increased bowel movements
These symptoms are not specific to thyroid disease and can have many other causes.
Can Tiredness or Weight Changes Mean You Have a Thyroid Problem?
They can occur with thyroid disease, but they are also common symptoms of many other conditions, including sleep problems, iron deficiency, stress, diabetes, and depression. Symptoms alone cannot confirm a thyroid condition.
If you have been experiencing persistent tiredness and fatigue alongside other symptoms, a GP can help determine whether thyroid testing and further assessment are appropriate.
How Does a GP Check for Thyroid Problems?
A GP does not rely on symptoms alone when assessing the thyroid. The assessment usually begins with a conversation about symptoms, their duration, and relevant history.
A GP may:
- Ask about symptoms and when they started
- Review family and medical history
- Review current medicines and supplements
- Check pulse and other relevant observations
- Examine the neck where appropriate
- Request thyroid-function blood tests
- Consider further tests or referral based on findings
A general GP consultation can help review ongoing symptoms and determine whether thyroid testing may be appropriate.
If symptoms such as fatigue, unexplained weight changes or temperature sensitivity continue, a GP can review the pattern and decide whether thyroid testing may be appropriate.
What Blood Tests Check Thyroid Function?
Thyroid testing usually starts with TSH, with other thyroid tests added when clinically appropriate.
TSH
TSH stands for thyroid-stimulating hormone. It is produced by the pituitary gland and signals the thyroid to produce hormones. TSH is usually checked first because it is sensitive to changes in thyroid function.
Free T4
Free T4 is one of the main hormones produced by the thyroid. It may be measured alongside TSH when the initial result is abnormal or when more information is needed.
T3 and Other Tests
T3 may be tested in selected situations, particularly when hyperthyroidism is suspected. Thyroid antibodies may be ordered where autoimmune thyroid disease such as Hashimoto’s or Graves’ disease is being considered.
The tests requested depend on your symptoms, examination and initial thyroid results.
Where testing is recommended, thyroid function testing is available at Clarence Town Healthcare as part of the clinic’s pathology collection services.
What Does an Abnormal Thyroid Test Result Mean?
A high TSH can be associated with an underactive thyroid, while a low TSH can be associated with an overactive thyroid. However, TSH results can have other explanations and need to be interpreted alongside free T4, symptoms, medicines and medical history.
One mildly abnormal result does not always establish a permanent thyroid condition. RACGP notes that a mildly raised TSH may resolve, so repeat testing may sometimes be appropriate before further investigation or treatment.
Depending on the clinical picture, follow-up may involve repeat testing, additional thyroid tests, medication review, imaging or specialist referral.
Do You Need an Ultrasound for Thyroid Problems?
Not usually for a straightforward thyroid hormone problem. Ultrasound is more relevant when there is a thyroid lump, visible neck swelling, or a structural concern that cannot be fully assessed through blood tests alone.
Thyroid blood tests assess how the gland is functioning. They do not fully assess a lump or swelling in the thyroid. A new or unexplained neck lump should be assessed by a GP.
When Should You See a GP About Thyroid Symptoms?
Consider booking a GP appointment for:
- Persistent unexplained fatigue or weight change
- Recurrent palpitations or tremor
- Persistent heat or cold intolerance
- Significant bowel changes alongside other symptoms
- Menstrual changes with possible thyroid symptoms
- A visible neck lump or swelling
- An abnormal thyroid blood-test result requiring follow-up
- Thyroid concerns during pregnancy or when planning pregnancy
When Can Thyroid Symptoms Need Urgent Care?
Severe thyroid emergencies are rare. Call Triple Zero (000) for severe symptoms such as a very rapid heart rate with fever and confusion, or extreme drowsiness, unconsciousness, very slow breathing or unusually low body temperature. These symptoms require urgent medical care.
FAQs
What are the early signs of thyroid problems?
Fatigue, weight change, temperature sensitivity, bowel changes, palpitations and mood or concentration changes may occur with thyroid problems. None of these symptoms is specific enough to diagnose thyroid disease on their own, so clinical assessment is needed.
What blood test checks your thyroid?
TSH is generally the first blood test. Free T4 and sometimes T3 may be added depending on the result and clinical circumstances.
Does a high TSH always mean hypothyroidism?
No. A high TSH can be associated with hypothyroidism, but it can have other explanations. Interpretation depends on free T4, symptoms, medicines, medical history and the clinical context.
Can you have a thyroid lump with normal blood tests?
Yes. Thyroid blood tests assess hormone function. A lump or enlargement is a structural issue that requires clinical examination and sometimes imaging, regardless of blood-test results.
Do I need to fast for a thyroid blood test?
No special preparation is usually required for a TSH test, although other blood tests ordered at the same time may have different requirements. Confirm with your GP or pathology provider before attending.
Getting Thyroid Symptoms Checked
Symptoms alone do not diagnose thyroid disease. GP assessment and targeted testing may help clarify whether thyroid function is involved and what the appropriate next step may be.
If you are concerned about possible thyroid symptoms or need follow-up of an abnormal result, book a GP appointment with Clarence Town Healthcare to discuss the next appropriate step.