What is the cause of bloody mucus in stool?

If there is blood and mucus in the stool, you should pay attention to it. The color and properties of the blood in the stool can be used to preliminarily judge some diseases. For example, if there is mucus in the stool, it is usually caused by gastroenteritis, tumors, colitis, etc. Such symptoms may occur. You should go to the hospital for examination in time. The best examination method is colonoscopy. Especially in recent years, the incidence of colorectal cancer has been relatively high, so you should pay attention to it.

1. Bright red blood in stool: mostly caused by hemorrhoids, intestinal polyps, rectal prolapse, anal fissure

"Fresh blood in the stool is mostly acute (immediate) bleeding." He said that the blood that flows out is similar to bleeding from trauma, and the color is bright red, purple, or dark red. After a while, it can coagulate into blood clots. It is common in hemorrhoids, intestinal polyps, rectal prolapse, anal fissures, etc.:

Hemorrhoids of all stages, internal and external hemorrhoids, and mixed hemorrhoids can cause bleeding in the stool, usually with fresh blood in the stool or blood dripping after defecation. External hemorrhoids generally do not cause bleeding in the stool.

Intestinal polyps cause painless stool bleeding, which occurs during bowel movements and stops after bowel movements. The amount of blood varies, and generally the blood does not mix with the stool. However, if the polyps are located high and there are many of them, they may also mix with the stool.

Rectal prolapse is characterized by repeated prolapse of anal tumors, and after a long illness, there may be bleeding during defecation.

The bleeding pattern of anal fissure is that there is blood on one side of the stool surface, which is not mixed with the stool. Some patients have blood dripping after defecation.

2. Stool with pus, blood, and mucus - tumor or inflammation

"If the excreted feces contains both pus (mucus) and blood, it is often seen in tumors and inflammation in the rectum or colon." Sun Feng said that common causes include rectal cancer, colon cancer, ulcerative colitis, intestinal infectious diseases, etc.

The blood of rectal cancer is fresher or dark red, and the stool is often mixed with blood, mucus, and feces. It may be accompanied by discomfort such as thinner stools, abnormally increased frequency of bowel movements, and a feeling of incomplete defecation.

The first symptoms of colon cancer may be bloody stools with pus or mucus (especially tumors in the left colon), which are dark in color and may be accompanied by abdominal masses, abdominal pain, chronic progressive weight loss, and other symptoms.

The patient has a long history of ulcerative colitis, with recurrent episodes of mucus or bloody stools, accompanied by left lower abdominal or lower abdominal pain.

Intestinal infectious diseases include bacillary dysentery, amoebiasis, etc.

3. Oily, black and shiny stools: gastric ulcer, duodenal bulb ulcer

Shiny black stools are also called "tarry stools", that is, the stools are black or brown-black. It is one of the most common symptoms of upper gastrointestinal bleeding, such as gastric ulcers, duodenal bulb ulcers, etc.

4. Invisible blood in stool: ulcers, inflammation and tumors

Small amounts (trace amounts) of gastrointestinal bleeding will not cause changes in stool color, and will only be positive in the fecal occult blood test, which is called occult blood in the stool. It is common in ulcers, inflammation and tumors. The fecal occult blood test can detect blood components. Early fecal occult blood tests for intestinal polyps (cancer) may be positive, and regular fecal occult blood testing is an important way to screen (primary screening) for colorectal tumors.