There are many reasons for blood in the stool, and the accompanying symptoms should be combined with the final diagnosis.
Hematochezia with abdominal pain: melena is accompanied by upper abdominal pain, irregularity, and significant weight loss. Considering upper gastrointestinal tumors, gastroscopy is recommended; melena is accompanied by repeated upper abdominal pain, periodic and rhythmic, after bleeding Pain relief, seen in peptic ulcers, barium meal or gastroscopy is recommended; bloody stools are accompanied by changes in stool characteristics, anemia, abdominal masses, weight loss, seen in colon cancer, colonoscopy is recommended; bloody stools and pus-blooded stools when abdominal pain, Abdominal pain relieved after defecation, seen in bacillary dysentery, amoebic dysentery or ulcerative colitis, stool culture is recommended.
Blood in the stool is accompanied by tenesmus: a feeling of bulging anus. Feeling of incomplete defecation, frequent defecation, little defecation volume each time, and no ease after defecation, suggesting anal and rectal disease, seen in dysentery, proctitis, and rectal cancer, requiring digital anal examination and colonoscopy.
Blood in the stool with pain in the anus: bleeding from anal fissure, bright red, but in a small amount, pain in the anus, blood on the surface of the stool, or blood on the toilet paper.
The amount of blood in the stool is large: internal hemorrhoids have a lot of bleeding, which is bright red, and bleeding during defecation. The bleeding usually stops after defecation is stopped, and it is applied to the surface of the stool, or blood alone, and the anus is not painful.
Hematochezia with systemic bleeding tendency: Patients with skin and mucous membrane bleeding can be seen in acute infectious diseases and blood diseases, such as severe hepatitis, epidemic hemorrhagic fever, leukemia, allergic purpura, hemophilia, etc.
Blood in the stool is accompanied by skin changes: For those with spider veins and liver palms, blood in the stool may be related to cirrhosis and portal hypertension.