When I eat my stomach contracts instead of expanding what is this disease or disorder called?

The sensation of your stomach contracting instead of expanding when eating could be related to a condition known as functional dyspepsia or possibly a motility disorder like gastroparesis. Functional dyspepsia involves discomfort in the upper abdomen, often associated with abnormal stomach muscle contractions. Gastroparesis, on the other hand, is a condition where the stomach takes too long to empty its contents, leading to symptoms like bloating and abdominal pain. It is best to consult a healthcare professional for an accurate diagnosis and appropriate treatment.