Without a bit more information it is difficult to answer your question specifically. In general, however, although the size of your stomach is unlikely to change, there can be some swelling particularly in the upper stomach after the surgery just above it. This will resolve over the first few days to a week after surgery. The other possibility and I have seen this in several of my patients, with the breasts reduced to a normal size, the abdomen appears relatively larger. I think that some women with large breasts have a large stomach to help balance out their proportions and then when the breasts are more normal sized, the stomach appears too big. A number of my breast reduction patients do end up losing weight after their surgery so their proportions are more normal. So what you are experiencing is normal. Good luck to you.