<unk> s, also known as osteophytes, are bony projections that form along joints.<unk> s form due to the body's increase of a damaged joint's surface area; most commonly from the onset of arthritis.<unk> s usually limit joint movement and typically cause pain.<unk> s form naturally on the back of spine as a person ages and are a sign of degeneration in the spine.  In this case the<unk> s are not the source of back pains, but instead are the common symptom of a deeper problem. However,<unk> s on the spine can impinge on nerves, which leave the spine for other parts of the body. This impingement can cause pain in both upper and lower limbs and a numbness or tingling sensations in the hands and feet due to the nerves supplying sensation to their dermatomes.  <unk> s can also appear on the feet, either along toes or the heel, and can also occur on the hands. In extreme cases it has been known for these<unk> s to grow along a person's entire skeletal structure, along the knees, hips, shoulders, ribs, arms and ankles. Such cases are only exhibited with multiple exostosis.
Osteophytes on the fingers or toes are known as Heberden's nodes (if on the DIP joint) or Bouchard's nodes (if on the PIP joints).<unk> s may also be the end result of certain disease processes.  Osteomyelitis, a bone infection, may leave the adjacent bone with a<unk>  formation.  Charcot foot, the neuropathic breakdown of the feet seen primarily in diabetics, will also leave<unk> s which may then become symptomatic.
Bone spur
Unicameral bone cyst
Intraosseous lipoma
Acromioclavicular separation
Synarthrosis
Pseudarthrosis
Freckle
Nursemaid's elbow