Blood in a Child's Stool: Possible Causes and When It Is Dangerous

Blood in a child's stool is one of those moments when a parent's mind races through everything in a second: from "ate something wrong" to the most frightening diagnoses. Let's calmly sort out what this could be and when you must not delay. I'll clarify right away that this is not a diagnosis and not a reason to panic, but a reason to figure things out.

What blood in a child's stool looks like and what its color means

Doctors divide gastrointestinal bleeding into upper and lower. Upper bleeding comes from the esophagus, stomach, and the beginning of the small intestine; lower bleeding comes from the rest of the small intestine, the colon, the rectum, and the anus. The appearance of the blood depends on where the bleeding is. A small amount may be noticeable only on toilet paper or as streaks in the stool. Black tarry stool is called melena and indicates bleeding in which the blood has had time to change under the action of the stomach and intestinal contents. Black stool can occur with bleeding without pronounced complaints. But black stool can also come from blueberries, beets, iron or bismuth preparations — that is not blood.

Less dangerous causes of blood in children's stool

Among the causes of bleeding there are conditions that are not dangerous: anal fissure and hemorrhoids. These conditions are considered non-serious causes. Bloody diarrhea or bleeding from the anus is a separate reason for concern.

More serious causes

Blood in the stool can also be a sign of more serious diseases: intestinal polyps, Crohn's disease or ulcerative colitis, stomach ulcer, intussusception (when the intestine "telescopes" into itself), Meckel's diverticulum, vascular anomalies of the mucosa, radiation injury to the intestine, as well as tumors of the gastrointestinal tract. Doctors separately mention esophageal and gastric varices, esophagitis, and Mallory-Weiss tear. That is exactly why you should not make a diagnosis from a photo on the internet.

• intestinal polyps
• Crohn's disease or ulcerative colitis
• intussusception
• Meckel's diverticulum

The presence of blood by itself is not always a reason to call an ambulance. Call 103 or 112 if the child has black tarry stool, a very large amount of blood in the stool, vomiting blood or material resembling coffee grounds, dizziness or fainting from blood loss, chest pain or difficulty breathing, or severe abdominal pain together with bleeding.

When a child's bloody stool requires urgent help

Focus on the overall condition. If the bleeding is heavy, the stool is black and sticky, the child is pale, has dizziness, shortness of breath, or severe abdominal pain — that is a reason not to wait until morning. With moderate discharge and normal well-being, it is reasonable to make an appointment with a doctor and discuss further steps.

How a doctor determines the cause of bleeding

First — examination and questions: when the blood was first noticed, what color it is, whether there was black stool, whether there was vomiting of blood. Then blood tests are possible (complete blood count, clotting parameters, platelets), stool tests for occult blood, CT or MRI, X-ray, endoscopy — gastroscopy, colonoscopy, sigmoidoscopy, capsule endoscopy. These are not prescriptions, but what the doctor may choose depending on the situation.

Which doctor to see

See a doctor: they will assess the condition and decide whether examinations and specialist consultations are needed. With severe pain, heavy blood, or worsening — go to the hospital immediately.

And yes, this article is for reference: it does not replace a consultation with a doctor who sees your child, not just a description on the internet.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer