A bunion is a bump of bone around the big toe joint. There is a
common belief that poor fitting shoes cause the
problem but the cause is often caused by
overpronation. The
overpronation causes the foot to roll-in toward the
big toe. This causes laxity (weakness) in the
tendons a and ligaments that keep the toes in line.
Then when you put the foot with weakened tendons and
ligaments into a narrow shoe, the increased pressure
causes the big toe to bend towards the middle of the
foot.
The bump
that you see at the base of the big toes is actually
the base of the toe bone sticking out the side.
Over time and without treatment the bump gets
bigger and more painful when wearing shoes.
It is
important to diagnosis and correct the biomechanical
problem that is causing this problem early, before
the deformity occurs. A custom, prescription
orthotic can be constructed to control the pronation
of the foot.