What is a bunion (hallux valgus; hallux abducto valgus)?
A bunion is generally considered as an enlargement of the joint (a lump of bone) at the base and side of the big toe – (specifically, the first metatarsophalangeal joint). Bunions form when the toe moves out of place. As the big toe bends towards the others this lump becomes larger and the bunion can become painful – arthritis and stiffness can eventually develop.
Hallux valgus or hallux abducto valgus (HAV) is the name used for the deviated position of the big toe and a bunion refers to the enlargement of the joint – most of the time the two go together and can just be referred to as ‘bunions’.