Stool is bluish-black

Introduction The stool is blue and black is often a manifestation of digestive tract disease. When the upper gastrointestinal tract is bleeding in the esophagus, stomach, duodenum, upper jejunum, and pancreas and biliary tract, the iron of hemoglobin in red blood cells is under the action of intestinal bacteria. Combined with sulfide to form iron sulfide, so that the stool appears blue-black.

Cause

Caused by digestive tract diseases.

an examination

Related inspection

Regular gastrointestinal CT examination

Can be routine, gastrointestinal CT examination.

Differential diagnosis

Can be distinguished from the color depth of stool.

Healthy people's stools are yellow or brown, in a cylindrical shape, yellow when eating more carbohydrates, brown when eating more protein. Certain diseases or individual drugs and foods can affect the color change of the stool, so that the lesions of the organs can also be observed from the color of the stool.

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