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A bunion is an enlargement of the joint at the base of the big
toe, the metatarsophalangeal (MTP) joint, that forms when
the bone or tissue at the big toe joint moves out of place. This
forces the toe to bend toward the others, causing an often painful
lump of bone on the foot. Since this joint carries a lot of the
body’s weight while walking, bunions can cause extreme pain
if left untreated. The MTP joint itself may become stiff and sore,
making even the wearing of shoes difficult or impossible. Bunions,
from the Latin "bunio," meaning enlargement, can
also occur on the outside of the foot along the little toe, where
it
is called a "bunionette" or "tailor’s bunion."
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