A bunion is a common foot condition that affects the big toe joint. It is characterized by a bony bump on the inside of the foot at the base of the big toe. This bump is formed by the displacement of the big toe joint and can cause pain, inflammation, and difficulty in walking.
Specifically, the bunion is located on the medial side (the side closest to the other toes) of the foot at the base of the big toe. The bump is formed by the head of the first metatarsal bone (the bone that connects to the big toe) protruding out of place. This misalignment causes the big toe to angle towards the other toes, and the joint becomes enlarged and inflamed.
Bunions can also develop on the fifth toe (little toe) on the lateral side of the foot, this is known as a "tailor's bunion" or "bunionette".