Answer: D

(1) Tarry feces

The feces is mushy, smells of blood, has no odor, is black in color, and has spots on the surface. It has an oily luster and looks like asphalt (commonly known as "asphalt") paving roads, hence its name.

This kind of stool is a manifestation of bleeding in the upper gastrointestinal tract (refers to the esophagus, stomach, duodenum and upper jejunum). Gastroduodenal ulcers, gastric cancer, and liver cirrhosis complicated by esophageal variceal rupture are common causes.

(2) White clay-like feces

The feces is off-white, loose, and shaped like the white clay used to make white pottery. This kind of stool is caused by the obstruction of the inner cavity of the biliary tract or the compression of the outer wall, which prevents bile from entering the intestine through the biliary tract, so the feces cannot be dyed yellow.

The occurrence of white clay-like stool is often caused by tumors in the biliary tract or organs surrounding the biliary tract compressing the biliary tract, gallstones, etc.

(3) Bloody stool

Bloody stool can be dark red whole bloody stool, or it can be blood mixed in the stool.

Bloody stools are mostly caused by bleeding in the lower gastrointestinal tract (referring to the lower jejunum, ileum and colon). Common diseases include malignant tumors of the small intestine, colon cancer, colon polyps, Crohn's disease, and Meckel's diverticulum ulcers.

(4) Bloody stool

Bloody stool refers to fresh blood adhering to the surface of the feces. Mainly seen in hemorrhoids, anal fissures, rectal polyps and early rectal cancer.

(5) Swill-like stool

This kind of stool is like the "swill" used in washing rice and washing dishes and pots. It has little fecal matter and is mixed with undigested food. . The stools are frequent and large in volume, with little or no odor. If there is such stool, it is common in diseases such as cholera and "gastrinoma".

(6) Mucus, pus and blood stools

The stools are mixed with mucus, pus and blood, or are all mucus, pus and blood, and the number of stools increases. The patient has the intention to defecate, but nothing comes out of the stool, that is, there is a feeling that "the intention to defecate is not exhausted". Doctors call this feeling "tenesmus."

Mucus, pus and bloody stools are common in bacterial dysentery or chronic ulcerative colitis.

(7) Watery feces after washing meat

The feces is dark red and watery, just like the water used for washing meat. At the same time, the patient also had "tenesmus". Mainly seen in acute enteritis caused by food poisoning.

(8) Jam-like stool

The color of the stool is like chocolate candy, mushy, and shaped like jam. Feces often contain collapsed and decayed tissue fragments and have a foul odor, which is mainly seen in "amoebic dysentery".

(9) Pasty feces

Feces are piles of paste, foamy, or like fermented dough. The patient has frequent bowel movements, accompanied by borborygmire, abdominal distension and large amounts of flatulence (commonly known as "farting"). Commonly seen in fermentative dyspepsia.

(10) Sea-blue watery stool

The stool is yellow-green, rice soup-like or sea-blue watery, containing translucent egg-like or mucosal-like material, with frequent bowel movements ,large. Patients usually have a history of using "broad-spectrum antibiotics." Broad-spectrum antibiotics are antibiotics that are effective against a variety of bacteria. Mainly seen in Staphylococcus aureus enteritis (also known as "pseudomembranous colitis").

(11) Fatty stool

Lots of stool, oil droplets on the surface of the stool, and a sour smell. Such patients may have fat digestion and absorption disorders, which are mainly seen in patients with chronic pancreatitis or pancreatic cancer.

(12) Loose stools

Loose stools refer to thin stools and frequent bowel movements. Commonly seen in indigestion, gastrointestinal neurosis and "irritable bowel syndrome" caused by abdominal cold.

(13) Hard ball-shaped feces

The feces is hard and spherical, resembling sheep feces balls or pebbles. It is difficult to pass and is seen in constipation. It can occur in people of all ages, but it is more common in middle-aged and elderly people. It is occasionally seen when suffering from "irritable bowel syndrome".