Tight fitting shoes are thought to be the cause of bunions in about 90% of patients. Shoes such as high heels are particularly damaging to the toes. These shoes have a sloping foot piece and a narrow toe box. The slope causes the front of the foot to be pushed with force into the narrow toe box. The narrow toe box causes the toes to become squeezed together. Depending on factors such as duration of wearing constraining footwear, skeletal maturity, and individual factors, the toes can become permanently adapted to the new position and lead to the formation of a bunion.
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