gastritis
Medical term for inflammation of the stomach lining. The older term 'gastric catarrh' is now rare in English.
Symptoms of gastritis include stomach pain and nausea.
I was diagnosed with chronic gastritis by the doctor.
atrophic gastritis
erosive gastritis
Compound of 胃 (i, 'stomach') and 炎 (en, 'inflammation'), a standard medical kanji formation.