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.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.