Yes. Crohn’s disease strictures can cause a bowel obstruction because they make part of the intestine narrower, leaving less room for food, fluid, and stool to pass. A stricture does not always cause a complete blockage, but it can slow movement or block it partly or fully. New or worsening crampy belly pain, swelling, vomiting, or trouble passing gas or stool needs urgent medical attention.
How Can a Crohn's Disease Stricture Block the Bowel?
A stricture is a narrowed section of the intestine. In Crohn’s disease, ongoing inflammation can thicken the intestinal wall and lead to scar tissue. As the opening becomes narrower, food, liquid, and digestive waste have less space to move through the bowel.
According to the Crohn’s & Colitis Foundation, chronic inflammation can cause the intestinal wall to thicken or develop scar tissue, creating a stricture that may lead to an intestinal blockage. The risk depends on the location and extent of the narrowing and how much it restricts the movement of intestinal contents.
A bowel obstruction occurs when food, fluid, gas, or stool cannot move through the intestine normally. The blockage may be partial or complete. A partial obstruction allows some contents to pass, while a complete obstruction prevents passage through the affected section. A stricture can cause either problem, depending on the degree of narrowing.
Does Every Crohn's Stricture Cause an Obstruction?
No. Some strictures cause few noticeable symptoms, while others interfere with digestion and lead to repeated abdominal discomfort or difficulty passing stool. A narrowing does not automatically mean that the bowel is blocked, and not every person with a stricture will need surgery.
The distinction between inflammation and scarring is important. In some strictures, active inflammation contributes to the narrowing. In others, lasting scar tissue plays a larger role. Some contain a mixture of both. Identifying what is contributing to the narrowing helps the healthcare team decide which treatments may be useful.
What Symptoms Can Occur With a Stricture or Bowel Obstruction?
The symptoms depend on how much the narrowed area affects the passage of intestinal contents. Experiences that may occur include:
- Crampy abdominal pain that comes and goes.
- Abdominal swelling or bloating.
- Nausea or vomiting.
- Constipation or a noticeable change in bowel movements.
- Difficulty passing gas or stool.
- Reduced appetite or an uncomfortable feeling of fullness.
According to Mayo Clinic, intestinal obstruction can cause crampy abdominal pain, constipation, vomiting, abdominal swelling, and difficulty passing stool or gas. These symptoms are not unique to Crohn’s strictures, but they can indicate a blockage that needs prompt assessment.
When Should You Seek Emergency Medical Care?
Seek emergency medical care if you have severe or worsening abdominal pain, repeated vomiting, increasing abdominal swelling, or an inability to pass stool or gas, particularly when these symptoms occur together. Do not wait for a routine gastroenterology appointment when a bowel obstruction is suspected.
An untreated obstruction can cause serious complications, including damage to the affected section of intestine if its blood supply is compromised. In some cases, the intestinal wall can develop a hole, allowing bowel contents to leak into the abdomen. Prompt medical assessment is important even if the symptoms initially seem similar to a previous Crohn’s flare.
How Do Doctors Check for a Crohn's Stricture or Bowel Obstruction?
Healthcare professionals consider the person's symptoms, medical history, previous Crohn’s complications, physical examination, and how symptoms have changed over time. They may also check for abdominal swelling, tenderness, dehydration, or other signs of a complication.
Imaging helps show where the intestine is narrowed and whether digestive contents are backing up. The Mayo Clinic guide to Crohn’s disease diagnosis and treatment describes CT scans, CT enterography, MRI, MR enterography, and intestinal ultrasound as tools used to assess the bowel and Crohn’s-related complications. The most appropriate test depends on the clinical situation.
A colonoscopy or another type of endoscopic examination may also be useful when the affected area can be reached safely. However, capsule endoscopy, which involves swallowing a small camera, may be unsafe when a stricture or obstruction is suspected because the capsule could become trapped. The healthcare team selects tests based on the suspected location and degree of narrowing.
How Are Crohn's Strictures and Bowel Obstructions Treated?
Treatment depends on whether the obstruction is partial or complete, whether active inflammation is present, how much scarring has developed, and whether there are signs of complications. Some people can be treated without an operation, while others need a procedure to open the narrowed section or surgery to relieve the blockage.
Treating Inflammation and Supporting the Bowel
When active Crohn’s inflammation contributes to a stricture, medication that controls inflammation may help improve the narrowing and related symptoms. If an obstruction requires hospital care, treatment may include temporary bowel rest, intravenous fluids, and close monitoring. Bowel rest means limiting or temporarily stopping food by mouth under medical supervision, according to the person's needs.
Medicines cannot always correct narrowing caused mainly by established scar tissue. A healthcare professional may therefore recommend a procedure when the narrowing continues to interfere with the passage of intestinal contents. Suspected acute obstruction needs urgent assessment rather than an attempt to manage it through diet or medication changes at home.
Can Balloon Dilation Open a Crohn's Stricture?
In selected cases, a gastroenterologist can use endoscopic balloon dilation to widen a narrowed section of bowel. During the procedure, an endoscope is used to guide a small balloon to the stricture. The balloon is then inflated carefully to enlarge the passage.
Crohn’s and Colitis Canada explains that balloon dilation can help some strictures, although it is not suitable for every narrowing and repeat procedures may be needed. The decision depends on the stricture's characteristics and the person's overall condition. Balloon dilation is not a substitute for emergency surgery when an obstruction or another complication requires immediate operative treatment.
When Is Surgery Needed?
Surgery may be necessary when a stricture causes a significant obstruction, symptoms remain difficult to manage, or medication and other procedures are unlikely to provide enough relief. It may also be required when there are serious complications that cannot be managed safely with other treatments.
The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) identifies intestinal obstructions caused by scarring as one reason surgery may be recommended for Crohn’s disease. The operation depends on the location, length, and condition of the affected bowel.
Two possible operations are:
- Strictureplasty: The surgeon widens the narrowed section without removing that portion of intestine. The Crohn’s & Colitis Foundation's information on strictureplasty explains how this procedure can preserve bowel tissue in suitable cases.
- Bowel resection: The surgeon removes the affected segment and reconnects the healthy ends when appropriate. The need for this operation depends on the condition and location of the diseased bowel.
Surgery can relieve an obstruction, but it does not cure Crohn’s disease. Ongoing treatment and follow-up remain important because inflammation and strictures may recur in the future.
Can Diet Help Prevent Problems With a Known Stricture?
Dietary changes may help some people manage symptoms when a stricture is known, but they cannot remove scar tissue or reliably prevent an acute obstruction. Depending on the location and degree of narrowing, a healthcare professional or dietitian may recommend temporarily reducing fiber or choosing foods that are easier to pass through the narrowed section.
Diet advice needs to be individualized. A diet that is suitable for someone with a stable narrowing may not be appropriate during an acute obstruction. Follow the instructions provided by your gastroenterology team, particularly if you have previously had a blockage or undergone bowel surgery. If symptoms suggest a new obstruction, seek urgent medical assessment instead of trying to manage the problem with dietary changes.
What Should You Discuss With Your Gastroenterologist?
If a stricture has been identified, useful topics to discuss include its location and length, whether inflammation or scar tissue appears to be contributing, the risk of obstruction, and whether monitoring, medication, balloon dilation, or surgery is appropriate. Ask which symptoms require emergency care and whether you need an individualized eating plan.
Regular follow-up can help your healthcare team monitor Crohn’s disease and reassess a known narrowing when symptoms change. Report new or persistent abdominal pain, vomiting, changes in bowel movements, or difficulty eating, especially if these symptoms interfere with daily activities. Early assessment can help identify complications and guide the next step in care.