6. Dark-colored stools
As mentioned, there are three types of peptic ulcers, one of them being a duodenal ulcer, which affects the upper portion of the small intestine. About 90 percent of digestion and nutrient absorption occurs in the small intestine. If you have a duodenal ulcer, it could cause bleeding. As that blood passes through the digestive tract, it can appear in the stools, making them appear darker in color – almost black. Darkened stools aren’t just a sign of a duodenal ulcer; it can also be a sign of a gastric or an esophageal ulcer.
Should one of these types of peptic ulcers bleed, the blood will also pass through the rest of the digestive tract and appear as darkened stools? Dark-colored stools can also be the result of certain medications, as well as certain types of foods and drinks, but if you’re concerned, see your doctor.