Loose bodies are pieces of cartilage or bone that are loose within the hip joint and are able to 'float' around inside the joint.
These loose bodies can cause damage and get locked or jammed inside the hip joint, leading to pain.
Loose bodies can come from injuries leading to fragments of bone or cartilage, the breakage of bone spurs (called osteophytes) or from a condition called Synovial chondromatosis. Synovial chondromatosis is a condition where the lining of the joint develops multiple loose bodies.
Loose bodies can be removed through hip arthroscopy.