What's with the black scum in the shit?

Functional dyspepsia due to gastric motility disorder, mainly including stomach and duodenum, chronic inflammation will cause normal peristaltic dysfunction of esophagus, stomach and duodenum, showing metabolic products and changes in stool characteristics. If accompanied by other abdominal pain, or burning sensation after eating, it is necessary to take digestive drugs or vitamin drugs as auxiliary conditioning treatment. It is also necessary to check stool routine or enteroscopy.