The Bichat fat bag is an accumulation of fat located between the masseter muscle and the buccinator muscle, on both sides of the face. These two muscles that allow chewing movements need a lubricating fat pad, which is the Bichat bag.
Although all people have them, in some cases these fatty cushions develop exaggeratedly, resulting in a face that is too round and bulky. It is then necessary to perform a weight loss by reducing the Bichat bags, known as Bichectomy.