A bunionette (also known as a tailor's bunion) is a painful bony prominence, or bump, on the outside of the fifth (little) toe. Over time, the bunionette may worsen as the fifth toe moves inward and the fifth metatarsal (the bone connected to it) moves outward. Rubbing between the bump and tight shoes may also cause a callus to grow over the fifth toe area. All bunionettes can cause pain and pressure on the outside of the foot, though often they do not cause symptoms.

An osteotomy is a surgically performed cut of the bone. A fifth metatarsal osteotomy refers to a cut in the head, neck, or shaft of the bone to make it straighter and the bony prominence smaller. This reduces rubbing on the outer side of the foot and decreases or eliminates the pain.