"Modern Health Daily" reported on October 17, 2012
The color of blood in the stool tells where it came from
The color of blood in the stool depends on the location of the gastrointestinal bleeding, the amount of bleeding and the time the blood stays in the intestine. Blood in the stool is a signal of dozens of diseases of the anus and digestive tract.
1. Blood from the upper gastrointestinal tract, stools are tarry or black
Accompanied by unexplained anemia, weight loss or upper abdominal masses, mostly gastric cancer bleeding; accompanied by usual acid reflux, belching or night pain, hunger pain, indicating that the possibility of gastric and duodenal ulcer bleeding is greater; if so History of liver disease or schistosomiasis, it may be cirrhosis of the esophagus. However, when the amount of upper gastrointestinal bleeding is large, the stool can also be bright red or dark red, and hematemesis is often combined at this time.
Once upper gastrointestinal bleeding occurs, especially when hemorrhage occurs, you should go to the hospital for medical treatment and undergo gastroscopy to confirm the diagnosis.
2. Blood from the lower digestive tract, stool is bloody red
1. Hemorrhoids: Hemorrhoids are the most common cause of blood in the stool. Bleeding usually occurs during defecation. The blood is bright red and adheres to the surface of the stool; it can also be dripped or sprayed out after the stool. The amount of bleeding is small and can only be on toilet paper. I saw blood on it. A small lump may protrude from the anus during a forced bowel movement.
2. Anal fissure: The blood in the stool caused by anal fissure is bloody and bright red. It often occurs after constipation. The amount of bleeding is less. It is manifested as anal drip after defecation or blood stained toilet paper, accompanied by severe anal pain during defecation, and slight relief of pain after defecation , And then began to have severe pain.
3. Colorectal cancer: 85% of early rectal cancer only manifests as blood in the stool, and more than 90% of rectal cancer cases are misdiagnosed as hemorrhoids at the initial stage, and 1% to 3% are eventually diagnosed as rectal cancer. Hematochezia caused by rectal cancer is most similar to hemorrhoid bleeding, but most of them are mixed with mucus and dark blood clots in the blood or stool, accompanied by anal drop, deformed and thinned stool, increased frequency or incomplete defecation; colon cancer often has stool Habit changes, including constipation, diarrhea, or alternating between the two, followed by abdominal pain, abdominal discomfort, or abdominal mass, anemia, weight loss, etc. may occur in the late stage.
4. Rectal polyps: The stools caused by rectal polyps are bloody red and painless, and the blood does not mix with stool.
5. Colitis and proctitis: The blood in the stool is mostly mixed with mucus and pus and blood, accompanied by abdominal pain, fever, increased defecation frequency and incomplete defecation.
3. Systemic disease, accompanied by systemic bleeding
Hematochezia is accompanied by bleeding from the skin, mucous membranes or other organs. It is more common in blood system diseases and other systemic diseases, such as leukemia, hemophilia, uremia, and some rare infectious diseases.