What it is
Muscle pain (myalgia) describes pain originating from muscle tissue — experienced as aching, soreness, tenderness, or deep dull pain within one or more muscles.
Pain, aching, or tenderness originating from one or more muscles — ranging from post-exercise soreness to fibromyalgia, viral myalgia, and inflammatory myopathy.

At a glance
What it is
Muscle pain (myalgia) describes pain originating from muscle tissue — experienced as aching, soreness, tenderness, or deep dull pain within one or more muscles.
Commonly experienced as
Evidence context
Research-supportedSee the evidence snapshotSafety
See staying safeContext
Myalgia (muscle pain) encompasses a spectrum from the familiar delayed onset muscle soreness (DOMS) following unaccustomed exercise, to the widespread, persistent muscle pain of fibromyalgia, to the acute diffuse myalgia of viral infection (influenza, COVID-19), to the proximal limb pain and weakness of inflammatory myopathy (polymyositis, dermatomyositis). Distribution, onset, character, and associated features guide differential diagnosis. Acute localised myalgia commonly reflects strain, overuse, or muscle contusion. Diffuse myalgia with systemic features (fever, fatigue) suggests viral or systemic illness. Persistent widespread myalgia with fatigue and sleep disturbance is characteristic of fibromyalgia. Medication-induced myopathy (particularly statins — in 5–10% of users) is an important and underrecognised cause. Proximal muscle weakness with pain raises concern for inflammatory myopathy.
The Evidence
What the evidence says about muscle pain — its causes, management options, and when professional assessment is essential.
Muscle pain is well-studied with clear management pathways
Myalgia has a broad range of causes — from exercise and viral illness to medication side effects and inflammatory conditions. Evidence supports targeted approaches depending on cause, with multidisciplinary care recommended for persistent or widespread presentations.
Severe muscle pain with dark or cola-coloured urine may indicate rhabdomyolysis — a potential renal emergency requiring immediate care. Proximal muscle weakness with pain may suggest inflammatory myopathy. Muscle pain on statin therapy with elevated CK warrants dose review. Myalgia with fever, weight loss, or lymphadenopathy needs systemic assessment.
Exercise-induced myalgia responds well to graduated activity and RICE principles. Fibromyalgia has the strongest evidence for aerobic exercise, CBT, and certain medications reviewed with a prescribing clinician. Viral myalgia is managed symptomatically. Physiotherapy and hydrotherapy benefit most persistent presentations.
Acute localised pain typically reflects strain or overuse. Diffuse myalgia with systemic features points toward viral or inflammatory illness. Persistent widespread pain with fatigue and sleep disturbance is characteristic of fibromyalgia. Statin-induced myopathy is a recognised and frequently underrecognised side effect affecting a meaningful proportion of users. Thyroid disorders and electrolyte imbalances are also common contributing factors.
Magnesium supplementation may support muscle function, particularly where deficiency is present. CoQ10 is sometimes used for statin-related myalgia, though evidence remains mixed. Topical arnica and curcumin (turmeric) have limited but emerging evidence for localised muscle discomfort. Given that muscle pain can reflect inflammatory or medication-related causes, ruling these out with a qualified practitioner matters before relying on adjuncts alone.
Thai massage, Ayurvedic kizhi (herbal bolus poultice), and TCM tuina use manual tissue work and heat to address muscle tension and pain. Mahanarayan oil and medicated oils are used in Ayurvedic practice for deep muscle pain. Epsom salt baths are widely used; some proponents suggest transdermal magnesium absorption as a possible mechanism, though this remains unconfirmed and evidence is limited.
Long-term high-dose NSAID use for myalgia carries gastrointestinal and renal risks without addressing the underlying cause. Strenuous exercise during active inflammatory myopathy may worsen muscle damage. Anyone with persistent, worsening, or unexplained muscle pain should seek professional assessment before continuing or starting any management approach.
Safety first
General, informational guidance — not diagnostic. A qualified practitioner can advise on your own situation.
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