Black or Tarry Stool: This can indicate bleeding in the upper gastrointestinal tract, such as from the stomach or small intestine. Potential causes include peptic ulcers and gastrointestinal cancers. Bright Red Stool: This may suggest bleeding in the lower gastrointestinal tract, such as the colon or rectum. Conditions like hemorrhoids can cause this, but it can also be a sign of colorectal cancer. Pale or Clay-Colored Stool: This can be a symptom of liver or bile duct problems, which might be related to cancers such as liver cancer or pancreatic cancer.
