7. Dark or Tar-like Stools: A Silent Alert
Stools taking on a darker, almost tar-like consistency and appearance are referred to as melena. While the shift might be subtle, it’s a vital indicator that there’s internal bleeding somewhere in the digestive tract, often resulting from PUD.
Though internal bleeding might not always be visible, melena provides a clear signal. The dark color arises from the blood being digested as it passes through the intestines.
It’s crucial to understand that this symptom often points to a slow bleed. Quick, intense bleeds might produce bright red blood in the stool instead.
While PUD is a significant cause of melena, other conditions can also lead to similar symptoms. Gastritis, certain medications, and even some foods can darken stool. However, in the context of PUD, the blood loss might be from the ulcer eroding into a blood vessel within the stomach or duodenum.(7)
