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Stools - Blood In

Definition

  • Blood in or on the stool
  • Blood can also be passed alone
  • Blood in the stools is mostly bright red
  • Blood from bleeding in the stomach comes out tar-black
  • Included: blood from constipation and anal fissure (tear)

Causes of Blood in Stool

  • Anal Fissure. If no diarrhea, most of these children have a small tear in the anus. This is called an anal fissure.  Anal fissures usually are caused by passage of a large or hard stool. This is the cause in 90% of children with blood in the stools.
  • Strep Skin Infection around the anus can also cause blood-streaked stools.
  • Bacterial Diarrhea. If also has bloody diarrhea, a gut bacterial infection may be the cause. Examples are Shigella, Salmonella, E.Coli 0157 or Campylobacter.
  • Cow's Milk Colitis. Starts within the first 2 months of life. Causes loose, slimy stools. Can be blood-streaked. Treatment: need to avoid cow's milk formulas.
  • Blood spreads rapidly and widely in water. Passing a stool with a few blood streaks often turns the toilet water pink. It doesn't mean a large blood loss.

Causes of Red Stools, but not Blood

The things listed below can also cause red-colored stools that look like blood:

  • Certain foods (such as tomatoes or beets)
  • Certain drinks (such as red Kool-Aid)
  • Certain medicines (such as amoxicillin or omnicef)

Anal Fissure or Tear

  • An anal fissure is the most common cause of blood in the stools.
  • It causes blood on the surface of a stool. Blood may also be found on toilet tissue after wiping.
  • The blood is always bright red.
  • Only a few streaks or flecks are seen.
  • You may see a shallow tear at 6 or 12 o'clock on the anus.
  • Caused by passing a large or hard stool.

Barton Schmitt MD, FAAP
Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.
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