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Tension in the neck, soreness after exercise, pulling pain in the shoulders and thighs: muscle pain is one of the most common symptoms of all. Most of the time it is harmless and goes away on its own. But: it can also be caused by statin side effects, polymyalgia rheumatica, or in an emergency even rhabdomyolysis. Here you'll learn which causes are typical, which warning signs you must not ignore, and what really helps.
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Muscle pain with weakness and dark (cola-coloured) urine? Suspected rhabdomyolysis – call 112 immediately!
Muscle pain (medically myalgia) is one of the most common symptoms of all. It can be local or generalised, acute or chronic, with or without weakness. The causes range from harmless soreness after exercise to serious conditions such as polymyalgia rheumatica or statin-induced rhabdomyolysis.
Most muscle pain is self-limiting and does not require specific treatment. The important thing is to recognise the red flags – situations where prompt evaluation is needed: dark urine, marked weakness, persistent high fever, or muscle pain on new statins.
Soreness (DOMS): Delayed muscle pain 24–72 hours after unaccustomed exertion. Microinjuries to the muscle fibres. Resolves on its own.
Muscle tension: Caused by poor posture, one-sided strain, stress – particularly common in the neck-shoulder area, the lower back (more: back pain) and the jaw.
Muscle strain, muscle fibre tear: Acute, sharp pain shooting in during or directly after exertion.
Muscle cramps: Acute, very painful spasms – particularly common in the calves. More: calf cramps.
Trigger points / myofascial pain syndromes: Locally tender points with radiating pain.
Fibromyalgia: Chronic generalised muscle pain with fatigue, sleep disturbances and cognitive impairment. A disorder of central pain processing.
Polymyalgia rheumatica: Typical in people over 50 – severe shoulder and pelvic-girdle complaints, morning stiffness, markedly elevated ESR/CRP, good response to corticosteroids. Often associated with giant cell arteritis.
Polymyositis and dermatomyositis: Inflammatory muscle diseases with weakness of the proximal muscles, muscle pain, elevated CK. Rare, but important to rule out.
Viral infections: Influenza, COVID-19, EBV or Lyme disease often cause generalised myalgia.
Thyroid disorders: Both hypo- and hyperthyroidism can cause muscle complaints – hypothyroidism typically with slow reflexes, fatigue and a tendency to cramp.
Vitamin D deficiency: A common cause of diffuse muscle pain, weakness and bone pain – especially in winter and in older people. Have your vitamin D level checked.
Magnesium deficiency: Especially associated with calf cramps and muscle twitching.
Potassium deficiency: While taking 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.
The duration of symptoms is an important distinguishing feature – it determines which causes are likely and whether systematic evaluation is needed.
| Feature | Acute muscle pain | Chronic muscle pain |
|---|---|---|
| Duration | Days to a few weeks | Over 3 months |
| Common triggers | Overuse, tension, injury, infection | Fibromyalgia, polymyalgia rheumatica, deficiencies, statins |
| Course | Usually resolves on its own | Requires systematic evaluation |
| Approach | Heat, gentle movement, possibly NSAIDs short-term | Medical evaluation with blood 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 assessed differently from local muscle pain (e.g. after injury or tension).
Soreness and tension: Heat, gentle movement, massage, possibly NSAIDs short-term.
Statin-induced myalgia: Contact your practice – often a pause, dose reduction or switch of statin helps.
Polymyalgia rheumatica: Usually rapid improvement with corticosteroids.
Fibromyalgia: Multimodal – exercise, cognitive behavioural therapy, possibly amitriptyline or duloxetine.
Deficiencies: Targeted supplementation (vitamin D, magnesium, iron, B12) when a deficiency has been confirmed.
Chronic muscle pain: Multimodal pain therapy, physiotherapy, possibly psychotherapy.
Moderate movement is helpful in the long term for most muscle complaints – resting often makes things worse. Structured stretching and strengthening exercises, ideally under the guidance of a physiotherapist, help prevent recurrences. Stress increases muscle tension; relaxation techniques such as progressive muscle relaxation (PMR) or yoga can help. Important: never stop statins on your own – they significantly reduce the risk of heart attack.
Medications are a frequently overlooked cause of muscle pain – by far the most important are statins. An overview:
| Medication | Effect on the muscles |
|---|---|
| Statins (atorvastatin, simvastatin, rosuvastatin) | Most common medication-related cause – myalgia, rarely rhabdomyolysis. Check CK, do not stop on your own |
| Fibrates, ezetimibe, PCSK9 inhibitors | Less common muscle complaints – risk increases when combined with statins |
| Corticosteroids (long-term systemic) | Steroid myopathy – painless muscle weakness, especially in thighs and shoulders |
| Fluoroquinolones (e.g. ciprofloxacin) | Rarely tendinopathies and myalgia – Achilles tendon ruptures also possible |
Other medications that can cause muscle and joint complaints: bisphosphonates, aromatase inhibitors, checkpoint inhibitors and antiretroviral medications.
Digital medication plan: Record all your medicines – your GP, rheumatology team, pain medicine team and pharmacy can immediately see which active substances may trigger muscle complaints. → Create medication plan
Interaction checker: Which medications worsen muscle complaints? → Start interaction check
Medication reminder: Take statins, painkillers or vitamin D on time. → Set up reminder
Sign up for free nowMore on this: Preparing for a doctor's appointment and Understanding blood values.
brite helps you keep a structured overview of pain progression, medication and lab values – so your GP and rheumatology team can find the cause more quickly.
