You wake after what should have been enough sleep, but your body feels as though it never properly switched off. Getting dressed takes effort. Concentrating at work feels harder, and by evening you have little energy left for the people or activities you care about.
Persistent exhaustion is different from feeling tired after a busy day. Recognising that causes like sleep issues, mental health, and physical health can contribute helps the audience feel understood and less anxious about their symptoms.
Fatigue has many possible causes. Poor-quality sleep, a physical health condition, medication, mental health and an overloaded life can all contribute. Sometimes several are present at once.
1. Your sleep may not be restorative
Time in bed is not the same as good-quality sleep. Brief awakenings can interrupt sleep even when you do not remember them.
Possible causes include:
- Insomnia
- Sleep apnoea
- Restless legs syndrome
- Pain
- Night sweats
- Anxiety
- Alcohol
- Frequent trips to the toilet
- An uncomfortable sleep environment
Snoring, gasping, choking, morning headaches or waking with a dry mouth may suggest sleep apnoea. If you notice these signs, consult a healthcare provider. The National Heart, Lung, and Blood Institute explains that diagnosis may involve a sleep study.
Perimenopause may also disturb sleep through hot flushes, night sweats and urinary symptoms. The Office on Women’s Health notes that disrupted sleep can leave women feeling more tired during the day.
Keep a simple sleep record for one or two weeks. Noting bedtime, waking, and how refreshed you feel can help you feel more in control while awaiting assessment.
2. A physical health condition may be affecting your energy
Fatigue is a symptom, not a diagnosis. Many physical conditions can produce it, and symptoms alone cannot identify the cause.
Possibilities include:
- Iron-deficiency anaemia
- Thyroid conditions
- Diabetes
- Vitamin B12 or folate deficiency
- Chronic pain
- Inflammatory or autoimmune conditions
- Coeliac disease
- Heart or lung conditions
- Infection or post-viral illness
- Pregnancy, where relevant
Heavy or prolonged periods can increase the risk of iron deficiency. Possible signs include tiredness, weakness, dizziness, breathlessness, palpitations and pale skin. The NHLBI guide to iron-deficiency anaemia advises that more significant anaemia may cause fatigue, breathlessness or chest pain.
Perimenopause may contribute indirectly when changing periods cause heavier bleeding or symptoms repeatedly disturb sleep. It should not become the automatic explanation for every new health change.
Do not begin high-dose iron or other supplements simply because you feel tired. Unnecessary supplements can cause side effects, interact with medicines and delay investigation of the actual cause.
3. Medicines or substances may be making you tired
Fatigue or drowsiness can be a side effect of prescription medicines, non-prescription products and some supplements.
Examples may include:
- Sedating antihistamines
- Some antidepressants or anxiety medicines
- Certain pain medicines
- Some blood-pressure treatments
- Sleeping tablets
- Muscle relaxants
- Alcohol or recreational substances
Even a medicine you have taken for some time may affect you differently after a dose change, a new health condition or the addition of another treatment.
Bring a complete list of medicines and supplements to your appointment. Do not stop prescribed treatment suddenly. Ask a doctor or pharmacist whether the dose, timing or combination could be contributing to your exhaustion.
4. Mental health can affect physical energy
Depression does not always look like obvious sadness. It may appear as exhaustion, reduced motivation, poor concentration, disrupted sleep, irritability or loss of interest in things you usually enjoy.
Anxiety can be equally draining. Constant worry, physical tension and feeling alert to every possible problem can leave you exhausted during the day while making it difficult to sleep at night.
Grief, trauma and prolonged uncertainty may also affect energy. These experiences can coexist with physical illness, so mental health should not be used to dismiss physical symptoms.
The MedlinePlus overview of fatigue lists depression, grief, sleep disorders, medicines, anaemia and thyroid conditions among the many possible causes.
Speak with a healthcare or mental health professional if low mood, anxiety or loss of interest is persistent or interfering with daily life. Seek urgent help if you have thoughts of suicide or self-harm or feel unable to keep yourself safe.
5. Your life load may exceed your opportunities to recover
Sometimes exhaustion makes sense when you look at everything a woman is carrying.
You may be managing paid work, childcare, ageing parents, housework, financial worries and other people’s emotional needs. Even when you sit down, your mind may still be planning, remembering and anticipating.
Life load is not “just stress”. It can affect sleep, meals, movement, relationships and whether you attend your own healthcare appointments.
Ask yourself:
- When did I last have time without responsibility?
- Which tasks am I carrying alone?
- Am I regularly skipping meals, movement or sleep to keep up?
- What could be shared, simplified or delayed?
- Does my tiredness improve when the pressure eases?
Reducing overload may help, but seeking medical assessment is essential, especially if symptoms persist, to ensure you feel supported and guided through the process.
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What you can do while arranging an assessment
Avoid turning exhaustion into another demanding self-improvement programme. Start with a few practical steps:
- Keep sleep and waking times reasonably consistent.
- Eat regularly and drink enough fluid for your needs and climate.
- Use caffeine for enjoyment rather than repeatedly masking severe tiredness.
- Choose gentle movement if it feels manageable.
- Record symptoms, periods, sleep and energy for one or two weeks.
- Reduce or share one non-essential responsibility.
- Avoid driving or operating machinery if you are struggling to stay awake.
If activity causes a severe or prolonged worsening of symptoms, do not keep pushing through it. Discuss the pattern with a healthcare professional.
A concise checklist for your healthcare appointment
Bring or note:
- When the exhaustion began and whether it is worsening
- How it affects work, relationships and everyday tasks
- Sleep length, quality, snoring or night-time waking
- Changes in periods, including heavy or prolonged bleeding
- Weight, appetite, thirst or bowel changes
- Pain, fever, breathlessness, dizziness or palpitations
- Recent infections
- Mood, anxiety and loss of interest
- Pregnancy possibility, if relevant
- All medicines and supplements
- Family and personal medical history
Questions to ask:
- What possible causes fit my symptoms?
- Could sleep quality be contributing?
- Could a medicine be responsible?
- Are blood or other tests appropriate?
- When should I return if symptoms continue?
- Which warning signs require urgent care?
Tests should be based on your symptoms, examination and medical history. They may include checks for anaemia, thyroid function, blood sugar or nutritional deficiencies, but not everyone needs the same investigations.
When exhaustion needs prompt medical attention
Arrange an appointment if your exhaustion has lasted several weeks, is worsening, has no clear explanation or is limiting normal activities.
Seek urgent medical help if it occurs with:
- Chest pain
- Severe or sudden breathlessness
- Fainting
- Sudden confusion
- New weakness or difficulty speaking
- Severe uncontrolled bleeding
- Black or bloody stools
- Thoughts of suicide or self-harm
Your exhaustion deserves a closer look
Constant exhaustion is not proof that something serious is wrong, but it is not something you should automatically accept as part of being busy, ageing or entering perimenopause.
Start with the pattern. Consider sleep, physical health, medication, mental health and the load you are carrying. Then take that information to a healthcare professional who can help you decide what needs investigation.
You do not need to wait until you can no longer function. Feeling persistently unlike yourself is reason enough to ask for support.
