Infection and sepsis warning signs in later life
Infection symptoms in older people can include confusion, falls or not eating; learn sepsis warning signs and when to seek urgent NHS help.
How this guide was prepared
Purpose: urgent guidance · Level: detailed
Checked by: Does Your Duck Quack. Sources are linked below; seek professional advice for individual circumstances.
The short answer
What to do first
Infection symptoms in older people can include confusion, falls or not eating; learn sepsis warning signs and when to seek urgent NHS help.
Start here: Look for a new cough, faster or harder breathing, pain when passing urine, needing to pass urine more often, a sore or spreading skin area, shivering, unusual sleepiness, reduced appetite or a marked change in strength. Some older people become confused, unsteady or less able to manage familiar tasks.
Do not wait: Call 999 now if there may be sepsis: signs include new confusion or slurred speech, extreme shivering or muscle pain, passing no urine in a day, severe breathlessness, or mottled or discoloured skin. Ask, “Could this be sepsis?” Do not wait for every symptom to appear.
Visual guides
See the decision at a glance
- Notice changeRecord fever or low temperature, shaking, new confusion, reduced urine, worsening pain, breathing change or rapid deterioration.
- Use special instructionsFollow any cancer, immune-suppression, wound, catheter or post-operative team thresholds immediately.
- Get urgent helpUse urgent NHS advice for concerning infection symptoms and call 999 if the person is severely unwell or in immediate danger.
Scope of this guide
This guide helps you understand the options and questions to ask. It is not personal medical, legal or financial advice. Check the official sources for your nation and seek qualified help for high-stakes decisions.
Call 999 for a life-threatening emergency. For an urgent problem that is not clearly life-threatening, use the official NHS urgent-care route for the UK nation you are in. Have the address, symptoms, onset time, medicines and allergies ready.
Who this guide is for
Older people who have become suddenly less well, and relatives or carers who know their usual behaviour and can help them get timely clinical advice.
Chest, urine and skin infections can affect anyone, but illness may first show as a change from a person’s usual self rather than a clear fever. Sudden confusion, weakness or a fall can have several causes, so do not assume it is a urine infection. Describe what has changed and how quickly; a clinician can assess the whole picture.
What to do now
1. Notice the change from usual
Look for a new cough, faster or harder breathing, pain when passing urine, needing to pass urine more often, a sore or spreading skin area, shivering, unusual sleepiness, reduced appetite or a marked change in strength. Some older people become confused, unsteady or less able to manage familiar tasks.
2. Ask what might be causing it
Contact a GP or the person’s clinical team for new or worsening symptoms. Give a clear timeline and mention recent illness, wounds, catheters, long-term conditions, medicines, allergies and any change in eating, drinking or urine output.
3. Choose the right route for advice
A pharmacist can advise about some minor infections and medicines, but cannot assess a seriously unwell person. Contact the GP practice promptly when symptoms are worsening, persistent or concerning.
4. Recognise possible sepsis
Sepsis is a life-threatening reaction to infection. Warning signs can include new confusion or slurred speech, extreme shivering or severe muscle pain, passing no urine, severe breathlessness, mottled or discoloured skin, or seeming seriously ill. A person may not have every sign.
5. Share observations and follow the plan
Write down when symptoms began, what is different, temperature if available, fluids and urine, and any treatment already given. Keep the person comfortable and follow advice about fluids, especially if they have a prescribed restriction.
6. Describe skin changes clearly
A skin infection can make an area painful, hot and swollen. Redness may be less obvious on brown or black skin, so describe pain, warmth, swelling and any blisters as well as colour. Cellulitis can develop through a break in the skin that is too small to notice. Ask for clinical assessment rather than assuming that a mark is simply an insect bite. When speaking to the clinician, identify the affected area and explain whether it is spreading or feels different from earlier in the day.
7. Watch the whole person during a chest illness
Pneumonia symptoms can develop suddenly or build up over several days. Alongside cough and breathing changes, an older person may seem confused, unusually tired or uninterested in food. Tell the clinician about heart or lung conditions, because these can affect how seriously someone is affected and whether hospital treatment is needed. Ask what improvement to expect and what should prompt another call. During recovery, cover coughs and sneezes, dispose of used tissues and wash hands regularly. Follow the agreed care plan rather than assuming a chest infection needs the same treatment as a previous illness.
8. NHS emergency advice for adults
“Call 999 or go to A&E if:” “An adult or child aged 5 years or over:” “is breathing very fast” “is confused, has slurred speech, or is not making sense” “has symptoms you're worried might be sepsis”
Warning signs and checks
- Describe what is different from the person’s normal behaviour or ability.
- Note when symptoms began and whether they are getting worse.
- List relevant conditions, allergies, medicines and recent procedures.
- Do not use confusion or urine smell alone to diagnose a UTI.
- Know the local urgent-care route when the GP practice is closed.
- Call 999 if sepsis warning signs or severe illness are present.
Common questions
Can a urine infection cause sudden confusion in an older person?
It can, but sudden confusion has many possible causes, including infection, dehydration, medicines and delirium. Cloudy or strong-smelling urine by itself does not confirm a urinary infection. Arrange prompt clinical advice and explain when the change began, any urinary symptoms, pain, fever or reduced intake, and the person’s usual thinking and behaviour.
What are the early warning signs of sepsis from a UTI?
Sepsis can follow a urinary infection, but there is no single early sign that safely rules it in or out. New confusion or slurred speech, extreme shivering, severe muscle pain, very little or no urine, serious breathing difficulty, or mottled skin are urgent warning signs.
Should I call a GP, NHS 111 or 999 for an infection?
Use 999 for suspected sepsis, severe breathing difficulty, collapse or another life-threatening change. Contact a GP promptly for a new infection, worsening symptoms or concerns about a vulnerable person. If the person is worsening rapidly, call 999; otherwise seek assessment rather than treating at home.
Can confusion alone mean someone needs antibiotics?
No. Confusion deserves assessment, especially when it is sudden, but it does not establish that an infection is present or that antibiotics are needed. A clinician considers symptoms, examination and appropriate tests, and may look for other causes. Avoid using leftover antibiotics or someone else’s prescription.
What can help someone recovering from sepsis?
Recovery can take weeks or months, and different people recover at different speeds. The NHS suggests allowing time, eating a balanced diet and starting activity slowly before building up. A diary of sleep, activity and symptoms can make progress easier to discuss at follow-up. Emotional changes and problems with concentration can also occur after sepsis. Tell the clinical team what is limiting everyday life and ask about support. New infection symptoms need fresh assessment; feeling unwell again should not simply be put down to the previous illness.
Differences across the UK
Emergency help through 999 is available across the UK. For urgent non-emergency advice, use NHS 111 in England and Wales, NHS 24 on 111 in Scotland, and the GP out-of-hours service in Northern Ireland. Local infection pathways and service access vary, so follow the advice for the person’s nation and health board or trust.
Call 999 now if there may be sepsis: signs include new confusion or slurred speech, extreme shivering or muscle pain, passing no urine in a day, severe breathlessness, or mottled or discoloured skin. Ask, “Could this be sepsis?” Do not wait for every symptom to appear.
Primary sources
The publisher checked this guide against the 13 official sources below. This is an editorial source check, not approval by a clinician, lawyer or benefits adviser.
- NHS: Sepsis
- NICE: Urinary tract infection in adults
- NHS: Urinary tract infections
- NHS: Chest infections
- NHS inform: Sepsis
- NHS 111 Wales: Urgent help
- nidirect: GP out-of-hours service
- NHS: When to call 999
- NHS 111 England
- NHS 24 Scotland: When to phone 111
- NHS 111 Wales: Calling 111
- NHS: Cellulitis
- NHS: Pneumonia
Related guides
- Sudden confusion and delirium: urgent action and support
- Pharmacist, GP, 111 or 999: choosing the right health help
- Catheter care at home: daily care and warning signs
Editorial note: By Does Your Duck Quack.