The short explanation
Yes, a thyroid test is a reasonable part of checking low mood and forgetfulness, especially in older women. An underactive thyroid can cause low mood, slowness, poor concentration and memory problems that look like depression or early memory loss. It is a simple blood test, and if the thyroid is the cause, treatment often helps. Even so, depression and memory conditions are common and real, and they need attention whether or not the thyroid is involved.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- A good assessment usually includes thyroid tests, a blood count, vitamin B12, sugar and kidney tests, and a review of her medicines, because several of these can cause similar symptoms. Hearing or vision problems can also make someone seem withdrawn.
- Going with her to the appointment and describing the changes you have noticed, with examples, is very helpful to the doctor.
- If depression is found, it can be treated with counselling, support and sometimes medicine; it is not simply part of ageing.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell you what is causing your mother's symptoms. A doctor's assessment and tests are needed.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Can her thyroid, B12 and other blood tests be checked?
- Could any of her medicines be causing this?
- Does she need a memory assessment?
- What support is available for depression in older people?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 if she talks about ending her life, becomes suddenly confused, or is very drowsy and hard to wake.
Get help the same day
- Get care the same day if her confusion comes on quickly over hours or days.
Book an appointment soon
- See a doctor within a few days to arrange an assessment and blood tests.
Sources
The evidence this explanation is built on.
- Hypothyroidism MedlinePlus (NIH)
- Underactive thyroid (hypothyroidism) NHS
- Thyroid diseases MedlinePlus (NIH)
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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