During the ageing process there is a loss of volume in the deep fat parcels of the mid-face alongside stretching of ligaments that hold them in place. In addition the skin tends to thin and sag. Add to this the long-term effects of gravity and the cheeks tend to drop down and sag forming nasolabial folds and marionette lines on the face. The jaw bone also undergoes changes with age that include thinning of the bone. Subsequently the jawline is not as prominent.