Cartilage is a flexible, elastic tissue that coats the surfaces of the bones in the joints to keep them working smoothly and protected. It is also found in the rib cage, ears, nose, bronchial tubes and other areas. It is also between the bones of the spinal column and a slipped or bulging ‘disc’ is when the cartilage becomes misplaced causing a great deal of pain. As nail professionals it is always important to sit correctly when working as long term spine curvature can cause this condition.