Musculoskeletal system and connective tissue (M00-M99).
- Bursitis (bursitis).
- Chronic polyarthritis
- Coalitio talonavicularis – malformation of the navicular and calcaneal bones.
- Gout (arthritis urica/uric acid-related joint inflammation or tophic gout)/hyperuricemia (elevation of uric acid levels in the blood).
- Calcaneal cyst (cyst in the heel bone area).
- Bekhterev’s disease – chronic inflammatory disease of the spine, which can lead to joint stiffness (ankylosis) of the affected joints.
- Paget’s disease (osteitis deformans) – bone disease associated with greatly increased bone remodeling.
- Osteomyelitis (bone marrow inflammation)
- Posterior impingement (entrapment syndrome) of the upper ankle joint (OSG).
- Tendinitis and (tendonitis) of the flexor hallucis longus tendon (Latin for “long big toe flexor”; a toe flexor muscle).
Injuries, poisonings, and other sequelae of external causes (S00-T98).
Medication
- Fluoride medication
Other differential diagnoses
- See also under “Foot pain”