Myalgia

Focal or diffuse pain, aching, soreness, or tenderness arising from skeletal muscle, resulting from injury, inflammation, metabolic disturbances, infection, or systemic disease.

Causes

• Muscle overuse

  • Strenuous physical exercise

  • Muscle strain

  • Trauma

  • Poor posture

  • Repetitive motion injuries

• Infectious causes

  • Influenza

  • Epstein–Barr virus (EBV)

  • Lyme disease

  • Viral myositis

• Inflammatory causes

  • Inflammatory myopathies

  • Polymyositis

  • Dermatomyositis

  • Immune-mediated necrotizing myopathy

• Medications associated with myopathy

  • Statins

  • ACE inhibitors

  • Corticosteroids

  • Antimalarial drugs

• Systemic disease causes

  • Systemic lupus erythematosus (SLE)

  • Rheumatoid arthritis

  • Hypothyroidism

  • Hyperthyroidism

  • Chronic kidney disease

  • Electrolyte disturbances

• Chronic pain disorders: Fibromyalgia, myofascial pain syndrome

• Vitamin D deficiency

• Vitamin B12 deficiency

• Dehydration

• Rhabdomyolysis