Sometimes, the bones of the joint will shift, but not become totally dislocated. This is called subluxation (slippage) and can be a chronic problem. While the bones will shift back into their original position, you may feel some pain until they do.
It is often difficult to tell whether the injury is a dislocated joint or a broken bone. A severe injury can result in both a dislocated joint and broken bone. All are considered emergency situations requiring immediate medical attention.