UTIs in older people: symptoms, confusion and treatment

By · Published 2026-09-21 · Last reviewed 2026-09-21

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Urinary tract infections in older people often look different from the textbook picture. As well as pain when peeing and needing to go more often, an older person may become suddenly confused, agitated, unusually sleepy or newly incontinent. Anyone aged 65 or over with UTI symptoms should speak to a GP or NHS 111 the same day, and sudden confusion or drowsiness needs a 999 call.

A urinary tract infection (UTI) in an older person does not always announce itself with burning and frequent trips to the toilet. Sudden confusion, agitation, new incontinence or simply seeming "not themselves" can be the first sign. People aged 65 and over are advised to get same-day medical advice for UTI symptoms rather than waiting to see if it clears.

This is general information, not medical advice: if you are worried about someone today, contact their GP, NHS 111 or, in an emergency, 999.

What are the symptoms of a UTI in an older person?

The NHS list of UTI symptoms applies at any age:

In older, frail people and in people with a urinary catheter, the NHS says the signs can also include:

A person living with dementia may not be able to tell you that it hurts to pee. The Alzheimer's Society advises that a sudden and unexplained change in behaviour, such as increased confusion, agitation or withdrawal, may be because of a UTI. If they have changed over a day or two, say so clearly when you call for help.

Dark or smelly urine on its own

Dark or strong-smelling pee without any other symptom is more often a sign that someone is not drinking enough than a sign of infection. Offer more fluids and keep an eye on them, and seek advice if other symptoms appear.

Why can a UTI cause sudden confusion?

Delirium is a change in a person's mental state that comes on suddenly, usually over one or two days. It is the body's reaction to being unwell, and infection is one of the common triggers in later life. It is more likely in people who are frail or who already have dementia.

The Alzheimer's Society describes two patterns of delirium:

A UTI is only one possible cause. Pain, another infection, constipation, dehydration, poor nutrition, a change in medication and a change of surroundings can all bring on delirium, so a clinician should look at the whole picture rather than assuming it is "just a water infection".

For many people, delirium improves within a few days once the cause is treated, though for some it takes weeks or months. While it lasts, stay with the person if you can and speak calmly in short, clear sentences.

When should you call the GP, 111 or 999?

Call 999 or go to A&E

The NHS advises calling 999 or going to A&E now if someone with UTI symptoms is confused, drowsy or has difficulty speaking.

An infection that spreads can lead to sepsis, a life-threatening reaction to infection. The NHS sepsis page says to call 999 or go to A&E if an adult:

The same page lists people over 75 and people with a catheter among those at higher risk. Trust your instincts: if you think it could be sepsis, call 999 and say so.

Get a same-day appointment or call 111

The NHS says to ask for an urgent GP appointment or get help from NHS 111 for UTI symptoms in anyone who:

NHS 111 operates in England, Scotland and Wales. In Northern Ireland, contact the GP surgery or the local GP out-of-hours service instead.

Can a pharmacist treat it?

In England, the Pharmacy First service lets pharmacists treat uncomplicated UTIs, but only in women aged 16 to 64. It does not cover men or anyone aged 65 or over, so an older relative needs the GP or 111. Scotland, Wales and Northern Ireland run their own pharmacy schemes with their own rules, so ask the pharmacist what they can offer.

Why might the GP not rely on a dipstick test?

Many families expect a quick dipstick test of a urine sample. For people over 65, official guidance points the other way. The UK Health Security Agency's diagnostic tool for primary care, developed for use in England, tells clinicians not to use urine dipsticks to diagnose a UTI in adults over 65.

The reason is that many older people carry bacteria in their urine without any infection or harm. The guidance notes that by the age of 80, about half of older adults living in care homes can have bacteria in their urine without infection. A dipstick would come back positive for these people whether or not they are ill.

A false positive matters for two reasons:

Instead, clinicians are asked to diagnose from symptoms and signs, such as new pain when peeing, new frequency, urgency or incontinence, fever, new tummy pain, visible blood in the urine and new or worsening delirium. They are also advised to send a urine sample to a laboratory before antibiotics are started, because resistant bacteria are more common in older adults.

Dipsticks are also not used to diagnose UTIs in people with a catheter, because catheters quickly pick up bacteria that do not necessarily cause illness. Scotland, Wales and Northern Ireland have their own guidance documents, so local practice may differ in detail.

How are UTIs treated in older people?

A GP or other prescriber will usually give a course of antibiotics when the symptoms point to a UTI. Things that help:

  1. Make sure the whole course is taken, even if the person seems better after a day or two.
  2. Tell the prescriber about all other medicines and any kidney problems, as these affect which antibiotic is suitable.
  3. Encourage regular drinks so that they pass pale urine through the day, unless a doctor has told them to restrict fluids, for example because of heart failure.
  4. Paracetamol can ease pain and a high temperature. Check the dose with a pharmacist if the person is small, frail or takes other medicines.
  5. Go back if things are not improving. Contact the GP or 111 if symptoms are no better after 48 hours, and call 999 if the person becomes confused, drowsy or very unwell.

Some older people need hospital treatment, for example if they cannot keep fluids or tablets down, if the infection has reached the kidneys, or if sepsis is suspected.

When UTIs keep coming back

If infections keep returning, the GP may send samples for testing, try a different antibiotic, offer a low-dose antibiotic for some months, or refer to a specialist. For women who have been through the menopause, the NHS says a vaginal oestrogen cream, tablet or ring may be offered.

The NHS says cranberry products and D-mannose may help some women who get repeated UTIs, but the evidence is limited, both can contain a lot of sugar, and cranberry should be avoided by anyone taking warfarin. Speak to a pharmacist or GP before trying either.

How can you help prevent UTIs in an older relative?

Most prevention comes down to fluids, toileting and hygiene.

Drinking enough

Older people are more at risk of dehydration, and the NHS points out that a person you care for may not have a sense of how much they are drinking. Practical ideas:

Some people drink less on purpose because they are worried about reaching the toilet in time. If that is happening, the answer is help with continence, not fewer drinks. Ask the GP for a referral to the local NHS continence service.

Toileting and hygiene

If they have a catheter

Catheters are a common route for infection. Wash your hands before and after touching the catheter or bag, keep the drainage bag below the level of the bladder and follow the district nurse's instructions for emptying and changing it. The NHS advises contacting the GP or community nurse if you think a person with a catheter has a UTI. It is also fair to ask, from time to time, whether the catheter is still needed.

If they live in a care home

It is reasonable to ask the home how it encourages residents to drink, how it records fluids for someone at risk, how quickly pads are changed, and who decides when to call the GP. A good home will tell you promptly about any change in behaviour and will not treat confusion as a UTI on the strength of a dipstick alone.

Frequently asked questions

Can a UTI cause confusion in an older person?

Yes. The NHS lists confusion and agitation among the signs of a UTI in older, frail people, and sudden confusion is known as delirium. It usually improves once the infection is treated. Sudden confusion always needs urgent medical attention, because a UTI is only one of several possible causes.

How long does confusion last after a UTI?

For many people it improves within a few days of starting the right treatment. Some people, especially those who are frail or living with dementia, take weeks or months to return to how they were. Tell the GP if the person is not recovering as expected.

Why did the GP not test the urine with a dipstick?

Guidance for primary care in England advises against using dipsticks to diagnose UTIs in people over 65, because many older people have harmless bacteria in their urine and would test positive without being ill. The GP should diagnose from the symptoms and may send a sample to a laboratory instead.

Can a pharmacist treat a UTI in someone over 65?

Not through Pharmacy First in England, which covers only women aged 16 to 64. A person aged 65 or over should contact their GP or NHS 111 for a same-day assessment. A pharmacist can still advise on pain relief and on the medicines the person already takes.

Does cranberry juice prevent UTIs?

The NHS says cranberry products may help some women who have repeated UTIs, but the evidence is limited and they will not treat an infection that has already started. Cranberry products can be high in sugar and should be avoided by anyone taking warfarin.

Key takeaways