A bunion is one of the more common disorders in daily life. It is likely to be associated with the wearing of high heels, hereditary or pointy shoes, etc. It seriously affects the patient’s walking posture and in severe cases can lead to other complications. It is characterized by a lateral deviation of the proximal phalanx relative to the toe head and is usually accompanied by an enlarged medial phalanx called a bunion. As the deformity worsens, the [longus longus flexor tendon and the seed suspensory ligament not only fail to stabilize the paper metatarsophalangeal joint, but exacerbate the deformity by deviating from the line of force associated with joint stability. Separation of the metatarsal head from the seed bone suspensory system and [slippage of the adductor muscle below the metatarsal head results in [valgus rotation anteriorly. As the degree of bigfoot deformity increases, the metatarsal trunk is pushed into an inversion or adduction position. 3-5% of patients with bigfoot have hypermobility of the metatarsocuneiform joint, which also accelerates the development of [valgus deformity.