Hallux valgus
A bunion is a bony deformity of the joint at the base of the big toe.
A bunion is the result of a deformity in the joint of your big toe. It is not clear exactly why this happens.
Bunions may only need to be treated if the deformity is severe and you experience significant pain and discomfort.
Bunion surgery can sometimes cause further problems, as can leaving bunions untreated.
Jo Burland, a teacher from Finchley, north London, was 15 when she first noticed some bumps had appeared on her feet. At the age of 34, she had an osteotomy.