What causes generalised weakness?

Short answer
Generalised weakness can be caused by poor sleep, infection, dehydration, anaemia, nutritional deficiency, thyroid disease, or blood sugar problems.
This answers one question. It is not a diagnosis and does not replace an assessment by a licensed doctor.
At a glance
- Patterns to notice
- Sudden or gradual; constant or intermittent
- Possible tests
- Blood count, thyroid, glucose and vitamin checks
Possible explanations
Weakness affecting the whole body differs from weakness in one arm or leg. Low iron, vitamin B12 or vitamin D can affect energy and muscle function. An underactive thyroid may slow body processes, while diabetes can cause fatigue when glucose is poorly controlled. A serious infection such as sepsis may cause sudden weakness with fever, confusion or rapid deterioration.
Practical next steps
Record when the weakness began, whether it fluctuates, and any weight change, thirst, breathlessness, numbness or bleeding. Drink regularly, eat balanced meals and avoid driving if you feel faint. A clinician may review medicines and arrange blood tests for anaemia, thyroid function, glucose and vitamin levels before recommending treatment such as iron supplementation or a vitamin B12 injection.
When to seek care
Get emergency help for sudden one-sided weakness, trouble speaking, severe breathlessness, chest pain, fainting, confusion, or rapidly worsening illness. Arrange prompt assessment for persistent weakness, black stools, heavy bleeding, fever, or difficulty walking.
Questions for your doctor
Ask which causes fit your symptoms, which tests are appropriate, and whether any current medicine, diet or sleep problem could contribute.
Find care
General Clinics & Polyclinics in Abu Dhabi
That answer is general. If you want it applied to your own case, these are licensed general clinics & polyclinics listed in Abu Dhabi.
27 Ar Ruwwad St - Shakhbout City - MSH4 - Abu Dhabi - United Arab Emirates
Accepts: Daman, Thiqa, Cigna, MetLife +20 more
Al Ruwais, Al Dhafrah
Accepts: Daman, Thiqa, AXA, Cigna +16 more
Al Bahyah - Al Bahyah Old - Abu Dhabi - United Arab Emirates
Accepts: Daman, Thiqa, Cigna, Allianz Care +18 more
Abu Dhabi
Accepts: Daman, Thiqa, AXA, Cigna +27 more
Ordered by verification status and how complete each clinic's public record is, then alphabetically. This is a directory listing, not a ranking — Zavis does not rate or recommend providers.
A factual listing drawn from the DHA, DOH and MOHAP licence registers. It is not a referral, an endorsement, or advice that any of these providers is right for you.
Questions people ask
Is generalised weakness the same as tiredness?
Not exactly. Tiredness is low energy, while weakness means reduced strength or difficulty doing usual movements; they can occur together.
When is weakness an emergency?
Sudden weakness with speech trouble, one-sided symptoms, confusion, severe breathlessness or fainting needs emergency assessment.
Related
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Medical disclaimer. This page is general health information, not medical advice, and it cannot diagnose you. Always consult a licensed healthcare provider about your own symptoms and treatment. In an emergency in the UAE, call 998 for an ambulance.