When this happens, the bones rub together and cause damage and pain.

The two bones in his foot rub together.

This can cause the bones to rub against each other, causing pain and stiffness.

When it breaks down, the bones rub together and cause damage and pain.

As this happens, the bones rub together and cause joint pain.

If the condition worsens, the bones could rub against each other, causing even more pain and loss of movement.

The places where these bones rub against each other are called facet joints.

If the condition worsens, the bones could rub against each other.

The bone drops a little and rubs on the tendons.

If the cartilage breaks down and wears away, the bones rub together.