What happens when purples become purple?

Purple stools may be related to food factors, upper gastrointestinal bleeding, intestinal diseases, etc.

1. Food factors

Eating foods containing purple pigments, such as purple cabbage, purple potato, red pitaya, blueberry, etc., may cause purple or black stools through the digestive tract.

2. Upper gastrointestinal bleeding

When there is upper gastrointestinal bleeding, blood is easily oxidized to make stools dark red to black, sometimes looking purple.

3. Intestinal diseases

When suffering from colitis, colon cancer and other intestinal diseases, it may cause digestive tract damage, and purple stools may appear.