I had the same thing at a week or so after surgery. It would wake me up from a sound sleep, and was very much physiological hunger. It would be eased by drinking a Protein Shake, but would be back again in a couple of hours. That feeling of hunger stayed with me until I started on solid food. Now at almost 4 weeks out I only feel hunger if I haven't eaten in several hours. It does get better, but it is hard to deal with while you are experiencing it. I felt very discouraged by the hunger feelings because I thought the surgery would curb that feeling. It did, it just took a while.
