CAUSES OF A SUNKEN FACE
One common cause of a sunken face is getting older or ageing. One reason that the face takes on a sunken look is due to loss of bone in the mouth. When the bone in the jaw is lost or when it shrinks, it creates a sunken look. Keeping that in mind, it is easy to understand how one or more missing teeth will also produce the same results. In health, the skin on your face rests over the teeth and gums. However, when teeth are missing in the mouth, the skin sinks.