In some feet with Hallux Limitus, the first toe starts to move toward the second toe as a means of relieving the excessive force within the joint. This causes an angulation of the toe to the metatarsal bone and the appearance of a bump on the big toe joint. This combination of angulation of the toes and the bump on the outside of the joint is what is commonly known as a bunion deformity. The deformity is also known as Hallux Abducto Valgus or HAV.

The deformity does run in families; however, the foot type is hereditary, not the bunion. Shoes do not usually cause bunions, although the wrong shoes can make the deformity more painful.

HAV is a progressive deformity. Treatment can slow or stop the progression in many cases and help prevent joint damage or the need for surgery.