Differential Diagnosis II: Gastritis Peptic Ulcer Case Study Patient Basics: Gastritis 2 Minute Medicine Doctors told me gastritis can't cause flank area pain or back pain. And now I'm stressing : r Gastritis Gastritis referes to inflammation of the gut lining. Symptoms might include pain, a burning sensation in the stomach, loss of appetite, nausea, indigestion, hiccups, vomiting, etc. A 2022 cohort study found that