A bunion forms on the joint at the base of the big toe (also known as the great toe), and eventually realigns your big toe toward the secondary toes. Basically, a bunion is a bone growth toward the inside of your big toe and causes consistent irritation and sometimes swelling as the big toe pushes its way toward the second toe. You may notice that your big toe ends up resting under or above the second, a condition called, plainly enough, “overlapping toes.”
As your big toe overlaps toward the inside, the outside of it tends to protrude, causing more irritation and pain. Like a lot of skin conditions on the foot, improperly fitting shoes can lead to bunions. However, so can a natural defect and arthritis.
Surgery is sometimes necessary but padding and shoe inserts are a more practical way to subdue a bunion.