In general, facial loss of fat is manifested by sunken cheeks, hollow eyes, even indentations. It is called facial lipodystrophy
/lipoatrophy. Mild to moderate clinical forms are seen in advanced age, and sometimes in healthy, young individuals (for example: marathon runners). More severe forms are associated with HIV infection and treatment of it. Nowadays, there are effective treatment options for correction of signs of facial fat loss.
Wishing You Optimal Health,