📋Overview

Bunions occur when the first metatarsal bone shifts medially while the big toe angles toward the smaller toes, resulting in a structural misalignment of the metatarsophalangeal joint. This progression causes the joint to protrude outward, creating a characteristic bump that changes the shape of the foot.

Known medically as hallux valgus, this condition involves a complex change in the underlying bony framework rather than a simple growth of bone. This structural shift can lead to localized swelling and changes in the alignment of the forefoot bones.

Educational overview only. This page summarizes publicly available health information for general understanding and awareness. It does not provide medical advice, diagnosis, or treatment. For personalized guidance or care decisions, consult a qualified healthcare professional.

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Medical codes (for reference)

UMLS CUI: C0006386
ICD-10-CM
M21.61
MeSH
D000071378
SNOMED CT (US)
415692008

Codes are provided for reference and interoperability. They are not a diagnosis.

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