Have gastritis but having a nausea around stomach,upper abdomen. no pain. watery feeling and better after eating but still there. no other symptoms.

Sure, consider...: ...There are lots of diseases of the stomach that can result in dyspepsia or pyrosis. These can be categorized as: problems with inflammation (e.g. Ulcers), with infection (e.g. H.Pylori or parasites), with motility (examples: gastroparesis, gastric outlet obstruction), with secretion (hyper or hypo-acidity), infiltrative (lymphoma, cancer), blood flow (gastropathies), functional dyspepsias, etc.