Bone spurs are sometimes called by their medical names, osteophytes and enthesophytes. Experts suggest both types of bone spurs are a reaction to skeletal stress.
1) Osteophytes are typically found at the edge of a bone at a joint. They are considered to be the result of friction and stress on the bone, and are often associated with osteoarthritis.
2) Enthesophytes are bone spurs that develop where ligament or tendon insert into a bone. (The site of attachment of soft tissue into bone is called an enthesis.) Enthesophytes may develop because of tight ligaments and tendons rubbing against bone, a soft tissue injury, or an inflammatory disease.
People do not always make the distinction between osteophytes and enthesophytes; Enthesophytes may sometimes be called osteophytes.