Final answer:
A bunion is a deformity at the base of the big toe caused by narrow, pointed footwear like sandals. It can lead to misalignment, with treatment options including properly fitted shoes and exercises. Hammertoes and congenital clubfoot are related foot deformities that may require specific interventions.
Step-by-step explanation:
The deformity between the halluces (big toes) and index toes caused by sandals as well as other narrow, pointed footwear such as high heels is known as a bunion. A bunion is a bony protrusion that forms on the metatarsophalangeal joint, the joint at the base of the big toe, as a result of pressure and misalignment due to tight or ill-fitting shoes. Apart from bunions, wearing such footwear can also cause hammertoes, which are abnormal bends in the middle joint of the toe.
Treatment options for these conditions may include wearing shoes with a roomy toe box, padding or taping the affected toes, exercises, and stretches. In severe cases, surgery might be necessary to correct the deformity. Furthermore, congenital conditions like clubfoot are present from birth and require different approaches for correction, often without the need for surgery, enabling individuals to lead normal lives.