Losing weight can cause significant changes in the face due to decreased body fat. With weight loss, excess fat on the face decreases and the cheeks, chin and the entire face become more prominent. But rapid weight loss or malnutrition can cause sagging skin and a gaunt appearance. Losing weight in a healthy and sustainable way is important to maintaining the beauty of your face and your overall health. Regular exercise, adequate fluid intake, a healthy diet, and adequate sleep can support weight loss while maintaining facial volume and skin elasticity.