The short explanation
A sudden change over a day, with confusion, not recognising family and unusual sleepiness in an older woman who was fine before, is a medical emergency until proven otherwise. This pattern is often called delirium and is usually caused by a physical problem, such as very low or high blood sugar, an infection like a urine or chest infection, dehydration, a stroke, or a medicine side effect. Please take her to a hospital emergency department today. It is not likely to be a mental illness that started suddenly, and many causes of delirium can be treated when found early.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- With diabetes, both low and high blood sugar can cause confusion. If you have a glucometer, check her sugar and tell the doctor the reading.
- Note when the change started, any fever, falls, new medicines, reduced eating or drinking, and changes in urine.
- Older people with delirium can recover, but it may take time, and doctors will check for the underlying cause.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell what is causing her confusion. Doctors need to examine her and do tests urgently.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- What is causing her sudden confusion?
- Which tests are needed for sugar, infection or stroke?
- Should her medicines be changed?
- How long might recovery take?
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 or take her to the nearest emergency department now. Sudden confusion, drowsiness and not recognising family are emergency signs, especially with diabetes.
Raise it at a routine appointment
- After she is treated, book a follow-up with her doctor to review her diabetes and medicines.
Sources
The evidence this explanation is built on.
- Psychosis NHS
- Mental health MedlinePlus (NIH)
- Depression 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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