My relative's dementia suddenly got worse. Is this normal?

Last week my mother-in-law was her usual self and suddenly became much more confused, drowsy, and talking nonsense. Can dementia get worse that quickly, overnight?

Such a rapid worsening is frightening, and it's natural that you immediately thought the worst. But there's good news hidden in your report: dementia doesn't usually get worse overnight.

Why it happens

The progression of dementia is usually slow and gradual, over months and years. A sudden change over days or hours usually indicates delirium, which is acute confusion caused by another factor: infection (urinary infections are very common), dehydration, constipation, pain, fever, new medications, or a fall.

Practical strategies

• Seek medical evaluation without delay, because the cause may be treatable.
• Check for signs of infection: fever, strong-smelling urine, cough, pain.
• Confirm if they have drunk and eaten enough in recent days.
• Review recent changes in medication.
• Note when it started and what changed, to inform the doctor.

What NOT to do

• Do not assume it's "just the disease progressing" and wait.
• Do not give medication on your own initiative.
• Do not leave the person without fluids thinking it will pass.

When to seek professional help

Call NHS 111 or contact your GP today. If there is intense drowsiness, high fever, or altered consciousness, go to A&E.

"I thought everything had 'suddenly advanced'. It was a urinary tract infection. Once treated, my mother returned almost to how she was." — Anonymous carer