A medical professional has highlighted the concerning reasons behind persistent tiredness, warning that unrelenting fatigue can be a key symptom of several underlying health conditions.
While occasional tiredness from poor sleep or excessive screen time is normal, Dr Sermed Mezher, a doctor who shares advice on social media, stresses that exhaustion which doesn't improve with rest warrants attention.
Beyond Simple Vitamin Deficiencies
In a recent TikTok video, Dr Mezher responded to concerns about vitamin D deficiency, a well-known culprit for extreme tiredness. A simple blood test can diagnose this, and the NHS advises a daily supplement from October to March. He notes, however, that other causes are not so easily identified.
If your fatigue is linked to low vitamin D, you might also experience general aches and pains alongside the weariness.
Sleep Apnoea and Disrupted Rest
Dr Mezher pointed out that tiredness combined with specific signs could indicate obstructive sleep apnoea. This condition severely impacts sleep quality, leaving sufferers exhausted during the day.
Key indicators include:
- Loud, frequent snoring
- Breathing that stops and starts during sleep
- Gasping or choking noises at night
- Waking up frequently
- Morning headaches and difficulty concentrating
Post-Viral Fatigue and ME/CFS
The doctor also warned that fatigue beginning after an infection could signal myalgic encephalomyelitis (ME/CFS), or chronic fatigue syndrome. This involves extreme tiredness that makes daily tasks difficult and is often worsened by physical or mental activity, a state known as post-exertional malaise.
According to the NHS, other core symptoms of ME/CFS include unrefreshing sleep, problems with memory and concentration ('brain fog'), and sleep disturbances like insomnia.
Lifestyle Factors and Other Medical Causes
Dr Mezher added that lifestyle choices are a frequent, though sometimes overlooked, reason for constant tiredness. Substances like alcohol and drugs can significantly interfere with both sleep quality and duration, leading to daytime exhaustion.
He concluded by noting that blood-related issues, such as thyroid problems or B12 deficiency, are also common causes. His final advice is clear: you shouldn't simply accept persistent exhaustion, as an underlying solution may exist.
If you experience extreme tiredness regularly, it is crucial to speak to your GP for a proper assessment and diagnosis.
