Most bone spurs cause no signs or symptoms. Often you don't even realize you have bone spurs until an X-ray for another condition reveals the growths. In some cases, though, bone spurs can cause pain and loss of motion in your joints.
Specific symptoms depend on where the bone spurs are located. Examples include:
- Knee. Bone spurs in your knee may make it painful to extend and bend your leg. The bony growths can get in the way of bones and tendons that keep your knee operating smoothly.
- Spine. Bone spurs on your vertebrae can narrow the space that contains your spinal cord. These bone spurs can pinch the spinal cord or its nerve roots and may sometimes cause weakness or numbness in your arms or legs.
- Hip. Bone spurs can make it painful to move your hip, although the pain is sometimes referred down to your knee. Depending upon the placement, bone spurs also can reduce the range of motion in your hip joint.
- Shoulder. Bone spurs can rub on your rotator cuff, a group of muscles and tendons that help control your shoulder movements. This can cause swelling (tendinitis) and tears in your rotator cuff.
- Fingers. Appearing as hard lumps under your skin, bone spurs can make the joints in your fingers look knobby.
When to see a doctor
Make an appointment with your doctor if you have pain or swelling in one or more joints or if you have difficulty moving a joint. Early treatment can help prevent or slow further joint damage.
Wear-and-tear arthritis (osteoarthritis) is the most common cause of bone spurs. As osteoarthritis breaks down the cartilage cushioning the ends of your bones, your body attempts to repair the loss by creating bone spurs near the damaged area. The extra bone may help increase the amount of surface area for load bearing.
Bone spurs can break off from the larger bone, becoming what doctors call loose bodies. Often bone spurs that have become loose bodies will float in your joint or become embedded in the lining of the joint (synovium).
Loose bodies can drift into the areas in between the bones that make up your joint, getting in the way and causing intermittent locking — a sensation that something is preventing you from moving your joint. This joint locking can come and go as the loose bodies move into and out of the way of your joint.