Ban Labs Gastrex Tablet is best for Digestion. Gastritis, indigestion, acidity, and bloating are all common side effects of sedentary living and stress. Gastritis is a catch-all term for a group of conditions that all have one thing in common: inflammation of the stomach lining. Infection with certain bacteria that can cause stomach ulcers can cause inflammation or gastritis. Certain pain relievers and alcohol consumption can also contribute to gastritis. Gastritis can appear suddenly (acute gastritis) or gradually (chronic gastritis). In some cases, gastritis can cause ulcers.