| Infection | | Viral myositis | | Tuberculosis | | Syphilis | | Trichinosis | | Poststreptococcal polymyalgia | | Osteomyelitis | | Septic arthritis | | Metabolic | | Osteomalacia (rickets) | | Hypervitaminosis A | | Scurvy | | Gaucher disease | | Renal tubular acidosis | | Metabolic myopathy | | | Tumors | | Leukemia | | Lymphoma | | Spinal cord tumors | | Bone tumors | | Ewing sarcoma | | Osteogenic sarcoma | | Osteoid osteoma | | Metastatic tumors (eg, neuroblastoma) | | Trauma | | Fractures | | Stress fractures | | Overuse syndromes | | | Miscellaneous | | Hypermobility syndrome | | Rheumatologic disease | | Somatization | | Fibromyalgia | | Intermittent nocturnal leg cramps | | Reflex sympathetic dystrophy | | Restless legs | | Sickle cell anemia | | Osteonecrosis (avascular necrosis) | | Slipped capital femoral epiphysis | | School phobia | | Patellofemoral pain syndrome | |
