Not feeling full in POST-Operation Weight Loss Surgery Q&A Posted 45 minutes ago I have had the same thing, so I measure everything I put in my mouth. These days I can definitely tell if I have overeaten, so hopefully the full feeling is coming along. I have been told that the pain blockers they use during surgery can last for quite a surprisingly long time and they make it difficult to feel the full feeling until it is completely worn off. I don't know how much validity there is behind that theory, but at least it's something. Sometimes my nose runs when I have had enough to eat. Some people get stuffy noses or hiccups when they have eaten enough too, maybe you have had a sign you can look for?