What is the most common cause of minor rectal bleeding?

What is the most common cause of minor rectal bleeding?

• A. Colon cancer
• B. Hemorrhoids
• C. Infection
• D. Tearing of mucosa from constipation

Answer: (D)

Tearing of the mucosa from constipation occurs when hard stool and straining irritate or injure the anal canal, creating a small anal fissure. This tear bleeds in a bright red, often modest amount that is typically noticeable with defecation. In practice, minor rectal bleeding from fissures is common, especially in people who experience constipation or infrequent bowel movements, because the mechanical trauma during wiping or passing stool produces a small amount of blood. While hemorrhoids can also cause rectal bleeding, they are more often associated with painless bleeding, whereas a fissure tends to be painful during and after defecation. Colon cancer and infections are less likely to present as simple, minor, isolated blood with otherwise normal bowel habits, making a fissure from constipation the more frequent, straightforward cause of mild bleeding in many cases.

Tearing of the mucosa from constipation occurs when hard stool and straining irritate or injure the anal canal, creating a small anal fissure. This tear bleeds in a bright red, often modest amount that is typically noticeable with defecation. In practice, minor rectal bleeding from fissures is common, especially in people who experience constipation or infrequent bowel movements, because the mechanical trauma during wiping or passing stool produces a small amount of blood.

While hemorrhoids can also cause rectal bleeding, they are more often associated with painless bleeding, whereas a fissure tends to be painful during and after defecation. Colon cancer and infections are less likely to present as simple, minor, isolated blood with otherwise normal bowel habits, making a fissure from constipation the more frequent, straightforward cause of mild bleeding in many cases.