A perforation is a hole in the bowel wall that lets its contents leak into the abdomen. It causes sudden severe pain, a rigid board-like abdomen, fever and vomiting, and it worsens over hours. It is a surgical emergency and needs hospital assessment immediately, not overnight observation.
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Most abdominal pain can wait until morning. Intestinal perforation is the exception, and telling the difference is the whole point of this page.
A perforation is a hole in the wall of the intestine. Once it opens, bowel contents and bacteria leak into the abdominal cavity, and the body responds fast. The pain is not the kind you talk yourself out of.
What a Perforation Actually Is
The intestines are long tubes that carry partly digested food, digestive juices and a very large population of bacteria. The bowel wall keeps all of that safely inside. A perforation breaks that seal.
What follows is peritonitis, an inflammation of the lining of the abdominal cavity. It spreads quickly and can affect the whole body, which is why perforation is treated as a surgical emergency rather than something to observe.
The Symptoms
Symptoms usually arrive suddenly and get worse rather than better. The combination matters more than any single sign.
- Sudden severe abdominal pain. Often described as the worst pain the person has had. It may start in one place and spread across the whole abdomen.
- A hard, rigid abdomen. The belly feels board-like and tender to even light touch. This is one of the most specific signs.
- Pain that is worse with any movement. People lie very still, because coughing, turning over or walking makes it sharply worse.
- Fever and chills as infection takes hold.
- Nausea and persistent vomiting.
- No wind or bowel movement at all, as the bowel stops moving.
- Rapid heartbeat, dizziness or confusion, which suggest the infection is affecting the whole body.
The Distinguishing Feature
Ordinary indigestion, wind or a stomach bug comes and goes, eases with rest or antacids, and lets you find a comfortable position. Perforation pain is constant, escalating, and no position helps. A rigid abdomen with severe pain is an emergency until proven otherwise.
How It Progresses
| Stage | What You Notice | What It Signals |
|---|---|---|
| Early, first hours | Sudden sharp pain, mild nausea, discomfort on moving | The wall has been breached and leakage has begun |
| Progressing | Rigid bloated abdomen, persistent vomiting, fever | Infection is spreading through the abdominal cavity |
| Advanced | Rapid pulse, dizziness, confusion, low blood pressure | The infection is affecting the whole body and needs immediate care |
The important pattern is the direction of travel. Ordinary abdominal upsets improve over hours. This gets steadily worse.
What Causes a Perforation
It is almost always a complication of something else rather than an event on its own.
- Inflamed pouches in the colon, known as diverticulitis, which is one of the most common causes in older adults.
- An untreated stomach or duodenal ulcer that erodes all the way through the wall. Ulcer warning signs include black or tarry stools and vomiting that looks like coffee grounds.
- A burst appendix. Appendicitis that is left too long can rupture, which is why the migrating pain pattern of appendicitis is worth recognising early.
- Inflammatory bowel disease, such as Crohn's disease or ulcerative colitis.
- Blockages and tumours that raise pressure inside the bowel until the wall gives way.
- Injury, from an accident, a swallowed object, or occasionally as a complication of a procedure.
- Long-term anti-inflammatory medicines, which can weaken the stomach and bowel lining.
A trapped hernia can also cut off the blood supply to a loop of bowel and lead to the same outcome, which is covered in what a hernia feels like when it becomes an emergency.
Who Is at Higher Risk
Risk is higher in older adults, in people with long-standing digestive conditions such as diverticular disease or inflammatory bowel disease, in those taking regular anti-inflammatory painkillers or steroids, and in anyone who has recently had abdominal surgery or an endoscopic procedure.
If any of these apply to you, a sudden change in your usual abdominal symptoms deserves a lower threshold for getting checked. Our guide to mapping abdominal pain by location covers the more everyday causes.
Why Hours Matter
Once bowel contents enter the abdominal cavity, infection spreads through tissue that has no defence against it. Treatment usually means surgery to close the hole and wash out the contamination, along with antibiotics and fluids.
Outcomes are strongly tied to how quickly that happens. People treated early often recover well and return to normal routines. Delay allows the infection to become body-wide, which is a much harder situation to treat.
While You Are on the Way
Do not eat or drink anything, in case surgery is needed. Do not take painkillers or laxatives, which can mask the picture or make things worse. Go to an emergency department rather than waiting for a scheduled appointment.
Reducing your risk comes down to managing the conditions that cause it: treating ulcers and persistent gastric problems properly, avoiding unnecessary long-term anti-inflammatories, keeping a high-fibre diet if you have diverticular disease, and not ignoring abdominal pain that is behaving differently from usual.
Frequently Asked Questions
Can intestinal perforation happen without pain at first?
It is rare. Pain is usually the earliest and most prominent symptom. A small number of people, particularly older adults or those on steroids, notice bloating or fever before the pain becomes severe.
Is a burst appendix the same as an intestinal perforation?
They are related but not identical. A burst appendix is a rupture of the appendix itself rather than of the bowel wall, though both spill infected material into the abdomen and both are surgical emergencies.
How fast do the symptoms develop?
Usually over hours rather than days, moving from discomfort to severe illness quite quickly. That speed is part of what distinguishes it.
Can medication cause a perforation?
Long-term use of anti-inflammatory painkillers or steroids can weaken the stomach and bowel lining and raise the risk, particularly alongside an existing ulcer.
Are there warning signs in the days beforehand?
Sometimes. People with diverticulitis or a known ulcer may notice increasing pain, fever or a change in their usual pattern before a perforation occurs.
Does it always require surgery?
Most cases need surgical repair. In a small number of stable, contained cases doctors may try antibiotics and close monitoring, but this is the exception.
Can children get an intestinal perforation?
Yes, though the causes differ and more often involve swallowed objects, severe infection or congenital conditions.
How long is recovery?
It varies with how quickly treatment began and how much infection had spread. Hospital stays and recovery typically run from several days to a few weeks.
Can diet help prevent it?
For causes such as diverticular disease, a high-fibre diet and good hydration lower the risk. Diet cannot prevent perforation from an ulcer or an injury.
What is the difference between a perforation and a blockage?
A blockage stops things moving through the bowel. A perforation is a hole in the wall. A severe blockage can raise pressure enough to cause a perforation, so the two are linked.
Can stress cause a perforation?
Not directly. Stress can worsen underlying conditions such as ulcers, which in turn carry the risk.
How do doctors confirm it?
Examination findings such as a rigid abdomen, together with blood tests and imaging, usually a CT scan, which can show free air in the abdomen.
How do I tell ordinary stomach pain from a possible perforation?
Perforation pain is sudden, severe, constant and worsening, usually with a rigid abdomen, fever or vomiting. Everyday indigestion fluctuates, eases with rest and lets you get comfortable.
Sudden severe abdominal pain?
Our emergency and gastro surgery teams operate around the clock.