Everyone feels tired sometimes. A few late nights, a demanding week, parenting, shift work, stress or a busy schedule can all leave you feeling drained. But when tiredness becomes persistent, unexplained or starts affecting your normal life, it may be time to look more closely.
At Shire Family Medical, fatigue is approached as a symptom with many possible causes. Sometimes the answer is simple. Sometimes it is a combination of sleep, stress, nutrition, hormones, iron levels, mental health, infection, medication or an underlying health condition.
This article explains when fatigue is worth discussing with your GP, what your doctor may ask, and how blood tests or follow-up care may fit into the bigger picture.
Fatigue Is More Than Feeling Sleepy
Fatigue is not always the same as being sleepy. Some people describe it as low energy. Others say they feel heavy, flat, weak, foggy or unable to get through normal tasks.
You may notice:
- You wake up tired even after sleeping.
- Usual activities feel harder than they should.
- You need more rest than normal.
- You lose concentration or feel mentally foggy.
- You feel physically weak or run down.
- You are struggling to exercise, work or parent as usual.
- Your mood, patience or motivation has changed.
Fatigue can come on suddenly or build gradually. Some people only realise how tired they have become when they start avoiding activities they used to manage easily.
When Should You Speak With a GP?
It is reasonable to book a GP appointment if fatigue has lasted more than a couple of weeks, is not improving, worries you, or is stopping you from doing normal activities.
You should seek medical advice sooner if fatigue is associated with:
- Unexplained weight loss.
- Shortness of breath.
- Chest pain, palpitations or fainting.
- Persistent fever or night sweats.
- New or worsening pain.
- Blood in stool, urine or vomit.
- Heavy periods or signs of low iron.
- Low mood, anxiety or thoughts of self-harm.
- Extreme sleepiness, confusion or sudden weakness.
If symptoms are severe, sudden or feel urgent, call 000 or seek emergency care.
Common Reasons Fatigue Can Happen
Fatigue has many possible causes. Sometimes there is one clear reason. Often, several factors overlap.
Your GP may consider:
- Poor sleep, insomnia or sleep apnoea.
- Stress, anxiety, depression or burnout.
- Recent viral infection, including flu, COVID or glandular fever.
- Low iron, iron deficiency or anaemia.
- Thyroid problems.
- Diabetes risk or blood sugar concerns.
- Vitamin deficiencies.
- Medication side effects.
- Alcohol, caffeine or other substance use.
- Heart, kidney, liver, inflammatory or autoimmune conditions.
- Pregnancy, perimenopause or other hormonal changes.
This is why fatigue should not be dismissed as “just stress” without considering the full picture. Stress may be part of the story, but it is not the only possible explanation.
What Your GP May Ask
A fatigue appointment usually starts with a careful history. Your GP may ask what the tiredness feels like, when it began, whether it is improving or worsening, and whether rest helps.
They may also ask about:
- Your sleep quality and sleep routine.
- Snoring, waking unrefreshed or daytime sleepiness.
- Work hours, shift work or caring responsibilities.
- Diet, alcohol, caffeine and exercise.
- Mood, stress and anxiety symptoms.
- Recent infections or travel.
- Periods, bleeding, pregnancy possibility or menopause symptoms.
- Bowel changes, urinary symptoms or pain.
- Current medications and supplements.
- Family history and previous blood test results.
It helps to be specific. Instead of saying only “I’m tired”, try to describe what has changed. For example: “I used to walk 30 minutes easily, but now I need to stop after 10,” or “I’m sleeping eight hours but waking exhausted.”
Will I Need Blood Tests?
Not always, but blood tests are commonly discussed when fatigue is persistent, unexplained or associated with other symptoms.
Your GP may consider tests for:
- Full blood count and anaemia.
- Iron studies and ferritin.
- Thyroid function.
- Blood sugar or diabetes risk.
- Kidney and liver function.
- Inflammation markers.
- Vitamin B12, folate or vitamin D where clinically relevant.
Shire Family Medical offers on-site pathology collection after GP referral, helping connect testing with clinical review and follow-up.
Blood tests are useful only when they are interpreted properly. A result slightly outside a range may not always explain fatigue, and a normal result does not mean symptoms are imaginary. Our related article on what happens after a blood test explains why context, trends and follow-up matter.
Fatigue and Low Iron
Low iron is one possible cause of fatigue, especially for people with heavy periods, pregnancy, breastfeeding, low dietary iron, gastrointestinal symptoms, previous surgery or other risk factors.
Symptoms may include tiredness, dizziness, shortness of breath on exertion, headaches, restless legs, poor concentration or feeling unusually cold. These symptoms can overlap with many other conditions, so blood tests are needed before assuming iron is the cause.
If iron deficiency is confirmed, your GP may discuss the likely cause and treatment options. For some eligible patients, oral iron may be enough. For others, further assessment or treatment may be needed. Our article on what to expect before and after an iron infusion explains how iron treatment may fit into a broader care plan where clinically appropriate.
Fatigue, Stress and Mental Health
Fatigue can be physical, emotional or both. Stress, anxiety, grief, burnout and depression can all affect energy, sleep, motivation and concentration.
Some people do not feel “sad” but notice they are irritable, flat, overwhelmed, disconnected or unable to recover after rest. Others feel physically tired because their mind is constantly switched on.
Your GP may ask about mood and stress because mental health is part of health, not because they are dismissing your symptoms. Physical and emotional causes can occur together, and both deserve attention.
Fatigue After Infection
Some people feel tired for weeks after a viral infection. This can happen after flu, COVID, glandular fever or other illnesses. Recovery may take time, especially if sleep, appetite, hydration and normal routines were disrupted.
However, ongoing fatigue after infection should still be reviewed if it is not improving, is severe, or is associated with breathlessness, chest symptoms, dizziness, weight loss, persistent fever or other concerning signs.
A GP can help decide whether monitoring, blood tests, gradual return to activity or further assessment is needed.
What You Can Do Before the Appointment
Before seeing your GP, it may help to track symptoms for a week or two.
Make note of:
- When fatigue is worst.
- How much sleep you are getting.
- Whether you wake refreshed.
- Caffeine, alcohol and exercise patterns.
- Periods, bleeding or other symptoms.
- Any recent illness.
- Weight changes, pain, mood changes or breathlessness.
- Medications and supplements.
You do not need a perfect diary. Even a short list can help your GP identify patterns and decide what to check first.
How a Health Check Can Help
If fatigue is part of a broader concern about your wellbeing, a structured check-up may be useful. Shire Family Medical’s Check-ups & GP Health Assessments service includes age-appropriate reviews that may consider medical history, lifestyle factors, family history, blood pressure, pathology tests and screening needs.
A check-up does not mean testing everything without a reason. It means looking at your health in a planned way and deciding which steps are relevant to you.
Fatigue Deserves a Proper Conversation
Tiredness is common, but persistent fatigue should not be ignored when it affects your daily life, worries you or comes with other symptoms. It may have a simple explanation, or it may be the first sign that something needs closer review.
For patients in Sutherland and the Sutherland Shire, Shire Family Medical can help assess ongoing tiredness, organise appropriate tests where clinically indicated, and guide follow-up care based on your results and symptoms.
Frequently Asked Questions
See your GP if fatigue lasts more than two weeks and is not improving, worries you, or stops you from doing normal activities. Seek advice sooner if fatigue comes with weight loss, shortness of breath, chest pain, fever, heavy bleeding, fainting or other concerning symptoms.
Yes. Stress, anxiety, burnout, grief and low mood can all contribute to fatigue. However, fatigue can also have physical causes, so persistent or unexplained tiredness should be discussed with a GP.
Your GP may consider blood tests such as a full blood count, iron studies, thyroid function, blood sugar, kidney and liver function, inflammation markers or vitamin levels, depending on your symptoms and history.
Yes. Low iron or anaemia can cause tiredness, weakness, dizziness, shortness of breath on exertion, headaches and poor concentration. Blood tests are needed to confirm whether iron deficiency is present.
Normal blood tests can be reassuring, but they do not always explain every symptom. Your GP may review sleep, mood, stress, medications, lifestyle, infection recovery or other possible causes and discuss follow-up if symptoms continue.
A longer appointment may be helpful if fatigue has been ongoing, you have several symptoms, or you want a broader health review. Ask reception when booking so enough time can be allowed.
This article is for general information only and is not a substitute for personalised medical advice. If you have symptoms, concerns about your health, or questions about treatment options, please speak with your GP or another qualified health professional. In an emergency, call 000. Any treatment, test, procedure or vaccination discussed may not be suitable for every patient. Suitability depends on individual assessment by a qualified health professional.