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The same color change can be observed after consuming foods that contain a substantial proportion of animal blood, such as black pudding or tiết canh. Conditions that can also cause blood in the stool include hemorrhoids, anal fissures, diverticulitis, colon cancer, and ulcerative colitis. This is known as melena, and is typically due to bleeding in the upper digestive tract, such as from a bleeding peptic ulcer. Black or red Feces can be black due to the presence of red blood cells that have been in the intestines long enough to be broken down by digestive enzymes. If there is decreased bile output, stool is much lighter in color. Bile pigments from the liver give stool its brownish color. Pale or gray Stool that is pale or grey may be caused by insufficient bile output due to conditions such as cholecystitis, gallstones, giardia parasitic infection, hepatitis, chronic pancreatitis, or cirrhosis. Yellow stool can be found in people with gastroesophageal reflux disease (GERD). Yellow stool can also indicate that food is passing through the digestive tract relatively quickly. Another cause of yellowing is a condition known as Gilbert's Syndrome. Yellow Yellowing of feces can be caused by an infection known as giardiasis, which derives its name from Giardia, an anaerobic flagellated protozoan parasite that can cause severe and communicable yellow diarrhea. Normally it is semisolid, with a mucus coating.

Human fecal matter varies significantly in appearance, depending on diet and health.īrown Human feces ordinarily has a light to dark brown coloration, which results from a combination of bile, and bilirubin derivatives of stercobilin and urobilin, from dead red blood cells. Meconium is a newborn baby's first feces. Types 5–7 are associated with increasing tendency to diarrhea or urgency. Types 3 and 4 are optimal, especially the latter, as these are the easiest to pass. Fluffy pieces with ragged edges, a mushy stool.Like a sausage or snake, smooth and soft.Like a sausage but with cracks on the surface.Separate hard lumps, like nuts (hard to pass).The form of the stool depends on the time it spends in the colon. Heaton at the University of Bristol and was first published in the Scandinavian Journal of Gastroenterology in 1997. Sometimes referred to in the UK as the Meyers Scale, it was developed by K.W. The Bristol stool scale is a medical aid designed to classify the form of human feces into seven categories. Containing human feces, and preventing spreading of pathogens from human feces via the fecal–oral route, are the main goals of sanitation. Human feces together with human urine are collectively referred to as human waste or human excreta. In the medical literature, the term " stool" is more commonly used than "feces". This is a normal occurrence when a prior bowel movement is incomplete, and feces is returned from the rectum to the large intestine, where water is further absorbed. Small pieces of harder, less moist feces can sometimes be seen impacted in the distal (final or lower) end. Normally human feces is semisolid, with a mucus coating. size, color, texture), according to the state of the diet, digestive system and general health. Human feces has similarities to the feces of other animals and varies significantly in appearance (i.e. It is discharged through the anus during a process called defecation. It also contains bacteria and a relatively small amount of metabolic waste products such as bacterially altered bilirubin, and the dead epithelial cells from the lining of the gut. Human feces (or faeces in British English) is the solid or semisolid remains of food that could not be digested or absorbed in the small intestine of humans, but has been further broken down by bacteria in the large intestine. Human feces photographed in a toilet, shortly after defecation.