Persistent Fatigue: Causes and Tests Worth Discussing Ongoing tiredness is not always caused by too little sleep. Anaemia, thyroid disorders, infections, sleep problems and psychological stress are possible contributors. Key symptoms or background Note the duration, whether sleep feels refreshing,…
Persistent Fatigue: Causes and Tests Worth Discussing
Ongoing tiredness is not always caused by too little sleep. Anaemia, thyroid disorders, infections, sleep problems and psychological stress are possible contributors.
Key symptoms or background
Note the duration, whether sleep feels refreshing, and associated weight loss, fever or breathlessness. A clinician may select a blood count or other tests after assessing your history.
What can you do?
Review sleep and medicines rather than ordering large test panels yourself. Seek urgent care for chest pain, fainting or marked shortness of breath.
Before talking to a specialist
Write down when symptoms began, possible triggers, medicines and earlier results. Online information cannot replace a physical examination in every situation.
Frequently asked question
Can one symptom or result establish a diagnosis?
No. Clinical history, examination and, when needed, additional tests must be considered together.
