I am having the same problem as far as fat under the chin that's not fat--I am actually very slender, about 115 pounds, and at first I thought it was just swelling from the sliding genioplasty (I also had the upper jaw moved up and the lower jaw rotated forward). However, at 4 weeks-plus it doesn't seem like swelling at all (though I know it takes a long time for your face to settle). However, the area is very soft and malleable, and it looks like a double chin no matter how I position my face. When I smile, it looks even worse.
I'm trying to be positive about it, but if I had known my neck/chin was going to look like this, I would have kept the open bite, because I was very confident before.
I'd also be interested to know if anyone else had this issue and if it was resolved--and if so, how they fixed it!
Thanks and best of luck with your healing.
