1. What you can do right now
Quick help with muscle pain
- Cola urine test: is the urine dark like cola or black tea? Combined with muscle weakness? Call 112 immediately (in the US: 911) or go to hospital – suspicion of rhabdomyolysis.
- Heat or cold: heat for tension and muscle soreness, cold for an acute injury.
- Gentle movement: resting often makes the course worse. Moderate movement and light stretching are better in the long term.
- Check statins: with new muscle pain on statins, have the CK level in the blood determined – do not stop on your own.
- Hydration: drink enough, especially with intense exertion, in summer and on diuretics.
EMERGENCY: rhabdomyolysis!
The classic triad: muscle pain + muscle weakness + dark (cola-coloured) urine. When muscle cells break down, myoglobin is released, which can acutely damage the kidneys. Risk factors: extreme exertion (CrossFit, marathon), statins, alcohol or drug misuse, injuries, prolonged immobilisation. Call 112 immediately (in the US: 911) or go to hospital – do not drive yourself.
2. Understanding muscle pain – what happens in the body?
Muscle pain (medically myalgia) is one of the most common symptoms of all. It can occur locally or in a generalised way, be acute or chronic, and go with or without weakness. The causes range from harmless muscle soreness after sport to serious illnesses like polymyalgia rheumatica or statin-induced rhabdomyolysis.
Most muscle pain is self-limiting and needs no specific therapy. The important thing is to recognise the red flags – that is, constellations in which a prompt assessment is necessary: dark urine, pronounced weakness, persistent high fever or muscle pain on new statins.
A simple self-test: statin check
Has your statin prescription recently had a new dose or a new active ingredient? Have the muscle symptoms occurred since then? Then the CK level in the blood should be determined. Important: never stop statins on your own – they considerably reduce the risk of a heart attack. Speak to the practice about a pause, a dose reduction or a change of active ingredient.
3. Common causes of muscle pain
3.1 Mechanical and from exertion
Muscle soreness (DOMS): delayed-onset muscle pain 24–72 hours after unaccustomed exertion. Micro-injuries of the muscle fibres. Subsides on its own.
Muscle tension: from poor posture, one-sided loading, stress – especially common in the neck-shoulder area, in the lower back (more: back pain) and in the jaw.
Muscle strain, torn muscle fibre: acute, sharp shooting pain during or right after exertion.
Muscle cramps: acute, very painful spasms – especially common in the calves. More: calf cramps.
Trigger points / myofascial pain syndromes: locally pressure-sensitive points with radiation.
3.2 Rheumatological and systemic
Fibromyalgia: chronic generalised muscle pain with tiredness, sleep problems and cognitive impairments. A disorder of central pain processing.
Polymyalgia rheumatica: typical in people over 50 – severe shoulder and pelvic girdle symptoms, morning stiffness, markedly raised ESR/CRP, a good response to cortisone. Frequently associated with giant cell arteritis.
Polymyositis and dermatomyositis: inflammatory muscle diseases with weakness of the proximal muscles, muscle pain, raised CK. Rare, but important to rule out.
Viral infections: influenza, COVID-19, EBV or Lyme disease often cause generalised myalgia.
Thyroid diseases: both an underactive and an overactive thyroid can cause muscle symptoms – an underactive thyroid typically with slow reflexes, tiredness and a tendency to cramps.
3.3 Deficiency states
Vitamin D deficiency: a common cause of diffuse muscle pain, weakness and bone pain – especially in winter and in older people. Have the vitamin D level checked.
Magnesium deficiency: especially associated with calf cramps and muscle twitching.
Potassium deficiency: on diuretics, with chronic vomiting or diarrhoea – muscle weakness and cramps.
Iron deficiency: can worsen restless legs symptoms and muscle pain.
Vitamin B12 deficiency: muscle weakness, tingling, neurological symptoms.
4. Acute or chronic?
The duration of the symptoms is an important distinguishing feature – it determines which causes are likely and whether a systematic assessment should be carried out.
| Feature | Acute muscle pain | Chronic muscle pain |
|---|
| Duration | Days to a few weeks | Over 3 months |
| Common triggers | Overloading, tension, injury, infection | Fibromyalgia, polymyalgia rheumatica, deficiency states, statins |
| Course | Usually subsides on its own | Requires a systematic assessment |
| Approach | Heat, gentle movement, a short course of NSAIDs if needed | Medical assessment with lab tests (CK, CRP, TSH, vitamin D) |
Also important: local vs. generalised. Generalised muscle pain (e.g. after a flu-like infection or with fibromyalgia) is to be assessed differently from local muscle pain (e.g. after an injury or tension).
5. What really helps
Treatment according to cause
Muscle soreness and tension: heat, gentle movement, massage, a short course of NSAIDs if needed.
Statin-induced myalgia: contact the practice – often a pause, a dose reduction or a change of statin helps.
Polymyalgia rheumatica: usually rapid improvement on cortisone.
Fibromyalgia: multimodal – exercise, cognitive behavioural therapy, amitriptyline or duloxetine if needed.
Deficiency states: targeted substitution (vitamin D, magnesium, iron, B12) with a proven deficiency.
Chronic muscle pain: multimodal pain therapy, physiotherapy, psychotherapy if needed.
What you can do yourself
Moderate movement is helpful in the long term for most muscle symptoms – resting often makes the course worse. Structured stretching and strengthening exercises, ideally under physiotherapy guidance, prevent relapses. Stress increases muscle tension; relaxation techniques like progressive muscle relaxation (PMR) or yoga can help. Important: never stop statins on your own – they considerably reduce the risk of a heart attack.
Muscle pain with weakness and dark (cola-coloured) urine? Suspicion of rhabdomyolysis – call 112 immediately (in the US: 911)!
