Stool with blood, that is, blood is discharged from the anus, it can be all blood, it can be a mixture of stool and blood, or it can be bleeding after the stool comes out. The color can be bright red, dark red, or tarry, all called blood in the stool. Hematochezia is generally seen in lower gastrointestinal bleeding, especially colorectal and anal bleeding, but occasionally upper gastrointestinal bleeding is seen.
1. Hemorrhoids: the most common, most young people have experience of hemorrhoids. Both hemorrhoids and mixed hemorrhoids can cause stool bleeding in various stages, and external hemorrhoids generally do not have stool mixed blood. The color is generally bright red, and does not mix with stool, and does not contain mucus. It is manifested as dripping of blood after stool, especially when indurated stool.
2. Rectal cancer: It is common in middle-aged and elderly people, and all age groups with blood in the stool should be alert to colorectal cancer. Often anal discomfort, incomplete defecation, increased frequency, thin strips of stool, pus and blood in the stool, fresh blood or dark red, there may be mucus in the stool, often blood, mucus, and stool are mixed. Often accompanied by abdominal distension and abdominal pain.
3. Colon cancer: It is common in middle-aged and elderly people, with changes in bowel habits. If the frequency of bowel movements increases, abdominal pain, diarrhea or constipation may occur, and abdominal masses may be palpable. Stool bleeding occurs gradually as the disease progresses, mostly bloody stools containing pus or mucus, with darker blood.
4. Ulcerative colitis: long-term mucus or pus and blood in the stool, accompanied by left lower abdominal pain or lower abdominal pain.
5. Anal fissure: The phenomenon is pain in the anus during defecation, and the pain will last for a while after defecation.
6. Rectal polyps ulcerated bleeding: rare, painless stool bleeding.
7. Intussusception: common in children, excretion of mucus and blood in the stool, often without stool. Abdominal pain is often present, and abdominal masses can be palpable.
8. Others. Rupture of esophageal and gastric varices and portal hypertensive gastropathy, gastroduodenal ulcer, acute gastric mucosal disease, esophageal and cardia mucosal laceration, malignant tumors (esophageal cancer, gastric cancer, periampullary cancer, etc.), Dieulafoy disease. Intestinal tuberculosis, typhoid fever, acute hemorrhagic necrotizing enteritis, hookworm disease, Crohn's disease, small bowel tumor, small bowel hemangioma, jejunal diverticulitis or ulcer, Meckel diverticulitis, acute bacterial dysentery, amoebic dysentery Schistosomiasis, ulcerative colitis, colonic diverticulitis, etc. Proctitis, radiation proctitis, anal fistula, etc. Hemangioma, telangiectasia, vascular malformation, vascular degeneration, ischemic enteritis, etc. Leukemia, thrombocytopenic purpura, hemophilia, hereditary telangiectasia, vitamin C and vitamin K deficiency, severe liver disease, uremia, epidemic hemorrhagic fever, sepsis, etc.