Tiredness, feeling cold or dry skin can have many causes. An underactive thyroid is one possibility a clinician can consider alongside your health history.
What symptoms can occur?
An underactive thyroid can cause tiredness, feeling cold, constipation, weight changes, dry skin or hair changes. Some people may have heavy or irregular periods. These symptoms are common in other conditions too, so they do not establish a diagnosis.
When should I seek advice?
Arrange a consultation if symptoms persist or you are concerned. Describe when changes started and how they affect daily life. Bring a list of medicines and previous test results, and mention pregnancy or pregnancy plans.
How is it assessed?
A clinician may recommend blood tests to check thyroid function and explain what the results mean. Ask whether any preparation is needed, how to receive results and whether repeat testing or further assessment is appropriate.
Discussing treatment
If an underactive thyroid is diagnosed, a clinician can explain treatment and follow-up. The plan depends on individual circumstances. Do not start or stop thyroid medicine or supplements without professional advice.
Frequently asked questions
Does tiredness always mean a thyroid problem?
No. Tiredness has many possible causes.
Can a blood test help?
A clinician may recommend thyroid function tests based on your symptoms and history.
Should I mention pregnancy plans?
Yes. Tell the clinician if you are pregnant or planning pregnancy.
Can I start thyroid medicine on my own?
No. Discuss testing and treatment with a clinician.
Related reading
Further reading
Explore Family Medicine services or contact the team about appointments.
This article is general information and does not replace individual clinical advice.