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Fatigue and Anaemia in Older Adults

"I just feel tired all the time." It is one of the commonest sentences older adults say to their doctors and families, and one of the hardest to pin down. Some tiredness is part of ageing: sleep becomes lighter, muscle mass falls, the body needs longer to recover. But persistent, new or worsening fatigue is not simply "old age". It is a symptom of something, and often of something that can be found and helped: anaemia, an underactive thyroid, diabetes, a hidden infection, heart or lung disease, kidney problems, depression, poor sleep, sleep apnoea, medicines, poor nutrition, dehydration or a slow recovery after illness. Because anaemia is among the most common and fixable causes in India, and because iron tablets are so easily bought, families may reach for a "blood tonic" without a diagnosis. A better approach is to describe the pattern carefully, arrange the right tests, treat the cause and support energy at home with pacing, food, movement and sleep. This guide explains how fatigue differs from sleepiness and weakness, the many causes, anaemia in particular, how doctors assess, what families can track, practical home strategies and the red flags. It is general information and does not name medicines or doses.

7 min read · Updated 2026-11-13

Hand-drawn line illustration of a stethoscope, a brain and a bowl of food for the guide "Fatigue and Anaemia in Older Adults"

What do we mean by tiredness?

Ask your parent to describe it: - Fatigue: a lack of energy, heaviness, exhaustion not relieved by rest. - Sleepiness: tendency to doze off; points to sleep disorders, sedating medicines or other causes; see sleep apnoea in older adults: signs and next steps and insomnia in older adults: sleep hygiene and when to get help. - Muscle weakness: difficulty lifting, standing or climbing; see sarcopenia: muscle loss, protein and strength. - Breathlessness on effort: points to the heart, lungs or anaemia. - Low mood and loss of interest: may look like tiredness; see depression in older adults.

Anaemia: the most common fixable cause

Anaemia means too little haemoglobin, the protein in red cells that carries oxygen. Lower oxygen delivery causes fatigue, weakness, breathlessness, pale skin, a fast heartbeat, dizziness, headache, cold hands and feet, poor concentration and, in people with heart disease, chest pain. In older adults, it is often caused by iron deficiency (frequently from slow bleeding in the gut), vitamin B12 or folate deficiency, long-term illness or inflammation, and kidney disease. The cause must be found. Taking iron without a diagnosis may not help and may delay detection of bleeding or other serious problems. For the full picture of causes, tests and treatment, see iron and anaemia in older adults and vitamin B12 in older vegetarians.

Hand-drawn line illustration of a hand, a bowl of food and hills and mountains, for the section "Anaemia: the most common fixable cause" of Fatigue and Anaemia in Older Adults
Illustration: Anaemia: the most common fixable cause

Other common causes of fatigue

What the doctor will do

Expect questions about the pattern and duration of tiredness, sleep, appetite, weight, bowel habits (black stools?), bleeding, breathlessness, mood, medicines, alcohol and other symptoms, followed by an examination and tests, which commonly include:

  • Blood count (haemoglobin and red cell size), iron studies, B12 and folate.
  • Thyroid, blood sugar, kidney and liver tests, calcium, vitamin D.
  • Markers of inflammation or infection; urine test; sometimes chest X-ray.
  • Electrocardiogram, and further heart or lung tests if needed.
  • Tests for bleeding in the gut, if anaemia suggests it.
  • Screening for depression and cognitive problems.
  • Sleep assessment.

A comprehensive geriatric assessment brings these together for complex cases; see comprehensive geriatric assessment explained.

What families can track at home

A short diary for one to two weeks helps the doctor:

Hand-drawn line illustration of a crescent moon and stars, a bowl of food and a stethoscope, for the section "What families can track at home" of Fatigue and Anaemia in Older Adults
Illustration: What families can track at home

Home strategies for energy

### Pace the day

  • Plan the day around the best hours, doing important tasks when energy is highest, often morning.
  • Break tasks into steps with rests; sit for washing, cooking and dressing; use a shower chair; see bathing safely with a shower chair.
  • Prioritise: do what matters; let go of what does not.
  • Short rests rather than long naps; limit daytime naps to about thirty minutes in the early afternoon to protect night sleep.
  • Avoid "boom and bust": overdoing it on a good day often leads to days of exhaustion.

### Move a little every day

Gentle, regular movement builds energy and strength, although it may feel counterintuitive. Start very small: a few minutes of walking, chair exercises and stretching, increasing slowly; see chair exercises for seniors and walking programme for older adults. A pedal exerciser can help those with limited mobility; see pedal exerciser guide. Stop for chest pain, severe breathlessness, dizziness or palpitations and tell the doctor.

### Eat and drink well

### Sleep

Keep a regular routine, get morning daylight, limit evening screens, caffeine and heavy meals, keep the bedroom cool and dark, and treat pain and night-time urination; see insomnia in older adults: sleep hygiene and when to get help. Report loud snoring and pauses in breathing.

### Mood and connection

Stay in touch with people, keep pleasant routines and interests, and seek help for low mood. Fatigue and depression often go together and each worsens the other.

When to see a doctor, and when it is an emergency

See a doctor within days for fatigue that is new, worsening or lasts more than two weeks, especially with weight loss, loss of appetite, pallor, breathlessness, swelling, fever, night sweats, black stools, bleeding, falls, new confusion or low mood.

Call 112 or go to hospital at once for chest pain or pressure, severe breathlessness, fainting, a very fast or very slow pulse with dizziness, vomiting blood or black tarry stools with weakness, stroke signs (face droop, weakness, speech difficulty), severe confusion or drowsiness, or collapse.

When to ask a professional

Ask the doctor for a thorough assessment of persistent fatigue, including blood tests and a medicine review. Ask a dietician for a nutrition plan, a physiotherapist for a graded exercise programme, and a counsellor or psychiatrist if mood is low. Ask an occupational therapist for energy-saving strategies. Seek urgent help for the emergency signs above.

Frequently asked questions

Is tiredness just part of getting older?

Some reduction in energy is normal, but persistent or sudden tiredness has causes that can often be found and treated, including anaemia, thyroid problems, infection and medicines.

Should I give my mother iron tablets for tiredness?

Not without tests. Anaemia needs its cause found, and iron can mask bleeding or be unhelpful. Ask the doctor.

Can exercise help fatigue?

Yes, gentle regular movement usually improves energy over weeks, started slowly with medical advice.

How long should I wait before seeing the doctor?

If tiredness lasts more than a couple of weeks or comes with warning signs, see the doctor soon.

Can medicines cause fatigue?

Yes, many can. Ask the doctor or pharmacist for a review; do not stop medicines on your own.

Sources and further reading

  • National Institute for Health and Care Excellence, Clinical Knowledge Summary: Tiredness and fatigue in adults
  • World Health Organization, haemoglobin concentrations for the diagnosis of anaemia and assessment of severity
  • British Society of Gastroenterology, guidelines for the management of iron deficiency anaemia in adults
  • World Health Organization, World report on ageing and health (2015)

Tags: fatiguetiredness elderlyanaemialow energyweaknesspacingblood testsConditions and devicesHealth monitoring devicesGut health and nutrition

Written by the Emoha editorial team. General information only.

This article is for general education and is not medical advice. Speak to your doctor before changing your exercise, diet or medicines.

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