Bunion: Metatarsophalangeal joint

Picture of a bunion and the joint at the base of the big toe

A bunion (hallux valgus) is an enlargement of bone or tissue around the joint at the base of the big toe (metatarsophalangeal joint). This results in a bump on the outside edge of this toe.

Last Updated: February 4, 2010

Author: Judy Dundas

Medical Review: William M. Green, MD - Emergency Medicine & Barry L. Scurran, DPM - Podiatric Surgery

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