My cheeks have sunken due to dieting.

I lost weight rapidly this summer, and even though I dieted through healthy exercise without any procedures,

I have sunken cheeks.

My face is on the thinner side compared to my body, but

As sunken cheeks even developed, every time people around me saw them

They're telling me to gain weight again. It's stressful because I keep losing weight only in my face. What procedures are available to fill out my face?