Sudden Severe Pain? Why Intussusception Happens & Medically Approved Next Steps

Sudden, severe abdominal pain—especially in a baby or young child—can be frightening. One possible cause doctors take very seriously is intussusception. While it's not common, it is a medical emergency that requires prompt care.

The good news? When identified early, intussusception is often successfully treated without surgery. Below, you'll find clear, medically grounded information about why intussusception happens, what symptoms to look for, and what to do next.

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What Is Intussusception?

Intussusception happens when one part of the intestine slides into an adjacent part, similar to how sections of a telescope fold into each other.

When this occurs:

• The intestine becomes blocked.
• Blood flow to the affected section can be reduced.
• Swelling and inflammation increase.
• If untreated, tissue damage can occur.

Intussusception most commonly affects infants and children between 6 months and 3 years old, but it can also occur in older children and adults (though this is less common and often has a different cause).

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Why Does Intussusception Happen?

In many young children, there is no clear cause. Doctors call this "idiopathic," meaning it happens without a known trigger.

However, some factors may increase the risk:

In Infants and Young Children

• Enlarged lymph tissue in the intestines (often after a viral infection)
• Recent gastrointestinal illness
• Seasonal viral infections
• A family history (rare)

In Older Children and Adults

When intussusception occurs outside of early childhood, there is more often a specific trigger, such as:

• Intestinal polyps
• Tumors (benign or malignant)
• Meckel's diverticulum
• Scar tissue from prior surgery
• Inflammatory bowel disease

In adults, identifying the underlying cause is especially important.

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What Does Intussusception Feel Like?

The most common symptom is sudden, severe abdominal pain. In babies and toddlers, this may look different than in adults.

In Babies and Young Children:

• Sudden episodes of intense crying
• Drawing knees up to the chest
• Episodes lasting several minutes, then stopping
• Vomiting
• Lethargy or unusual sleepiness
• Pale appearance
• Bloody or "currant jelly" stool (a late sign)

The pain often comes in waves every 15–20 minutes. Between episodes, the child may appear tired but relatively comfortable.

In Older Children and Adults:

• Severe cramping abdominal pain
• Nausea and vomiting
• Abdominal swelling
• Constipation or inability to pass gas
• Blood in stool (less common in adults)

Pain that comes and goes in waves is a key feature.

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When Is Intussusception an Emergency?

Intussusception is always considered urgent.

Seek immediate medical care if you notice:

• Sudden severe abdominal pain
• Repeated vomiting
• Blood in stool
• Extreme fatigue or limpness in a child
• Signs of dehydration
• A swollen or tender abdomen

Untreated intussusception can lead to:

• Bowel obstruction
• Tissue death due to loss of blood supply
• Infection
• Perforation (a hole in the intestine)
• Sepsis (a life-threatening infection)

Prompt treatment significantly reduces these risks.

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How Is Intussusception Diagnosed?

Doctors typically use imaging to confirm intussusception.

Common Diagnostic Tools:

• Ultrasound (most common and preferred in children)
• Abdominal X-ray
• CT scan (more common in adults)

Ultrasound is highly accurate and non-invasive, making it the first choice in children.

If you're unsure whether symptoms could point to this condition, Ubie's free AI-powered symptom checker for Intussusception can help you understand your symptoms and guide your next steps—though it should never replace or delay emergency medical care if symptoms are severe.

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Medically Approved Treatment for Intussusception

Treatment depends on age, severity, and whether complications are present.

1. Air or Contrast Enema (First-Line Treatment in Children)

In most children, intussusception is treated without surgery using a special enema performed in a hospital.

This procedure:

• Uses air or contrast material
• Is guided by ultrasound or X-ray
• Gently pushes the folded intestine back into place
• Is both diagnostic and therapeutic

Success rates are high—often over 80% when treated early.

The child is monitored afterward because recurrence can happen in a small percentage of cases.

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2. Surgery

Surgery may be needed if:

• The enema does not work
• There are signs of perforation
• The child is unstable
• There is a suspected structural cause
• The patient is an adult

During surgery:

• The surgeon manually reduces the intussusception.
• If tissue damage is severe, a portion of intestine may need to be removed.

In adults, surgery is more commonly required because there is often an underlying cause that needs correction.

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What Is Recovery Like?

Most children recover quickly if treated early.

After Successful Enema:

• Hospital observation for 12–24 hours
• Gradual return to feeding
• Monitoring for recurrence

After Surgery:

• Longer hospital stay
• Pain management
• Gradual return to normal eating
• Follow-up care

Recurrence happens in about 5–10% of children, usually within 72 hours. Parents are given clear instructions on what symptoms to watch for.

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Can Intussusception Be Prevented?

In most childhood cases, there is no known way to prevent it.

Because many cases occur without a clear cause, prevention is limited. However:

• Prompt evaluation of severe abdominal pain is critical.
• Monitoring children closely after viral illnesses may help parents notice symptoms early.
• Adults with known intestinal conditions should maintain regular medical follow-up.

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Key Takeaways About Intussusception

• Intussusception occurs when part of the intestine slides into another part.
• It most commonly affects children under 3.
• Sudden, severe, wave-like abdominal pain is the most common symptom.
• It is a medical emergency.
• Early treatment is often highly successful.
• Most children recover fully with prompt care.

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When to Speak to a Doctor

You should speak to a doctor immediately or seek emergency care if:

• A child has sudden severe abdominal pain
• There is repeated vomiting
• There is blood in stool
• The abdomen appears swollen or very tender
• The child becomes unusually sleepy or limp

For adults, severe abdominal pain that does not improve or is associated with vomiting, swelling, or bowel changes should also be urgently evaluated.

Abdominal pain can have many causes—some mild, some life-threatening. It is always better to err on the side of caution.

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Final Thoughts

Hearing that a child—or even you—might have intussusception is understandably stressful. But early recognition and treatment make a major difference. Most children treated promptly recover completely.

If symptoms seem concerning but you're unsure whether to seek emergency care, you can start by using Ubie's free AI-powered Intussusception symptom checker to better understand what you're experiencing and receive guidance on next steps—but remember, this should never delay seeking immediate medical attention if symptoms are severe.

Above all, trust your instincts. Sudden severe abdominal pain deserves medical attention. When in doubt, speak to a doctor immediately—especially when life-threatening complications are possible.