What is the reason for lower back pain and bloody stool? What disease may be hidden?

If a friend finds bleeding during bowel movements, don't be too nervous. First observe whether the bleeding is serious and whether the amount of blood is large. If the amount of blood is large, you should seek medical treatment in time. If it is relatively mild, you can use some dietary therapy methods on your own.

1. Colon and rectal cancer: Blood in the stool caused by colon cancer is most similar to hemorrhoid bleeding. The blood in the stool is bright red and is in the form of drops attached to the surface of the stool. In the late stage, there is anorectal prolapse and general weight loss, increased frequency of bowel movements, and alternating constipation and diarrhea.

2. Anal fissure: Anal fissure caused blood in the stool is also common in clinical practice. The blood is bright red and may drip or be wiped off with toilet paper. There is severe anal pain after defecation.

3. Hemorrhoids: Hemorrhoidal bleeding occurs during or after defecation. The blood is bright red and does not mix with feces. The amount of bleeding can be more or less.

4. Ulcerative colitis: causes blood in the stool, which is mostly mixed with mucus or pus and blood, and is accompanied by lower abdominal pain, fever, frequent bowel movements, and tenesmus.

5. Intestinal polyps: The blood caused by them is bright red and painless. The blood does not mix with the stool. Some patients have grooves on the surface of the stool.