Causes of blood in the stool Almost all gastrointestinal bleeding can cause blood in the stool, but the common causes of blood in the stool are:
(1) Anal diseases caused by blood in the stool:
①Blood red and no pain are more common in internal hemorrhoids. Stage I hemorrhoids are characterized by blood. They often bleed due to the hemorrhoids being rubbed by the stool. The blood may be dripped or ejected, or only blood on the toilet paper; Stage II hemorrhoids have little or no bleeding in the stool and often protrude outside the anus.
② Anal fissure blood in the stool is often accompanied by anal pain and typical periodic pain after stool.
③Anal canal cancer mainly manifests as blood in the stool and pain, which aggravates before defecation.
(2) Rectal diseases caused by blood in the stool:
① The main symptom of rectal polyps is blood in the stool, which is intermittent, bright red in color, and generally small in quantity. This disease is common in children.
②The main manifestations of rectal cancer are increased stool frequency, thin stools, mucus and blood, accompanied by tenesmus or incomplete defecation, blood in the stool is bright red or dark red in the early stage, and the amount is not large. There is often foul-smelling mucus in late stool, and weight Mitigation should be highly valued.
③ Radiation proctitis may also have blood in the stool, but there should be a history of radiation therapy.
(3) Causes of blood in the stool Colon disease:
① Colon polyps.
②Colon cancer: It is common in left colon cancer. Most patients have intractable constipation, and occasionally the number of stools may increase. When the cancer ruptures, it may stain the outside of the stool with blood or mucus, and even discharge pus.
③Chronic non-specific ulcerative colitis and bacillary dysentery: blood in the stool can be seen in both, and it is mostly discharged at the same time with mucus or pus, accompanied by abdominal pain.
(4) Amoebic dysentery caused by blood in the stool: so that blood is the main symptom, the stool is red in sauce, mucus is much, and has a foul smell.