Abnormal Stool
Sometimes, gastritis also causes abnormalities in the stools of many people. Feces might be tar-like, gritty, or black, which could be indicative that there are probably some issues with your upper digestive tract. In some rare cases, you would even notice blood in your stools. Bloody stools tend to suggest a stomach ulcer, which is the complication of gastritis. These are often serious issues, so make sure to inform your doctor or healthcare provider as soon as you notice them prevent further damages and complications. [4]
