Key Takeaways
- Bowel obstruction symptoms can include severe abdominal pain, bloating, nausea, vomiting, constipation, and an inability to pass gas.
- A bowel obstruction occurs when food, fluids, gas, or stool cannot move normally through the intestines.
- Obstructions may be partial or complete and can occur in either the small intestine or colon.
- Causes can include scar tissue, hernias, tumors, inflammatory bowel disease, volvulus, and severe constipation.
- A complete bowel obstruction can become a medical emergency and requires immediate evaluation.
- Treatment depends on the location, cause, and severity of the blockage. Some patients can be treated without surgery, while others require an operation.
In this article
What Is a Bowel Obstruction?
A bowel obstruction is a blockage that prevents the normal movement of digestive contents through the intestines. The blockage may occur in the small intestine or large intestine, also called the colon.
Some obstructions are partial, meaning a limited amount of material can continue to pass through the intestine. Others are complete and prevent intestinal contents from moving forward at all.
Recognizing bowel obstruction symptoms is important because an untreated blockage can interfere with blood flow to the intestine and potentially lead to serious complications.
At RS Surgical, evaluating the underlying cause of abdominal and colorectal symptoms is an important part of determining whether conservative treatment, further testing, or surgical intervention may be necessary.
What Are the Most Common Bowel Obstruction Symptoms?
Symptoms can vary depending on where the blockage occurs, whether it is partial or complete, and how quickly it develops.
Common warning signs include:
- Abdominal pain or cramping
- Abdominal swelling or bloating
- Nausea
- Vomiting
- Constipation
- Inability to pass gas
- Loss of appetite
- A feeling of fullness
- Changes in bowel movements
Symptoms may develop gradually with a partial obstruction or appear suddenly with a complete blockage.
Abdominal Pain and Cramping
Abdominal pain is one of the most recognizable symptoms of an intestinal blockage.
The pain may initially come and go in waves as the intestinal muscles contract in an attempt to push contents past the obstruction. Depending on the cause and severity, the pain may eventually become more persistent.
Severe or rapidly worsening abdominal pain requires prompt medical evaluation.
Abdominal Bloating and Distention
A blockage can cause food, fluid, and gas to accumulate behind the obstruction.
As this occurs, the abdomen may become noticeably swollen or distended. Some patients describe feeling unusually full even when they have eaten very little.
Significant abdominal distention combined with pain, vomiting, or inability to have a bowel movement should not be ignored.
Nausea and Vomiting
Nausea and vomiting are also common bowel obstruction symptoms, particularly when the blockage involves the small intestine.
Because digestive contents cannot move normally through the intestinal tract, they may begin moving backward.
Persistent vomiting can also lead to dehydration and electrolyte imbalances, creating additional medical concerns.
Constipation and Inability to Pass Gas
A complete obstruction may prevent stool and gas from passing through the intestines.
Patients may experience:
- Sudden constipation
- Inability to have a bowel movement
- Inability to pass gas
- Increasing abdominal pressure
However, a person with a partial obstruction may still be able to have bowel movements or pass some gas. Having a bowel movement does not necessarily rule out an intestinal blockage.
What Causes a Bowel Obstruction?
There are many potential causes of intestinal obstruction.
Abdominal Adhesions
Adhesions are bands of scar-like tissue that can develop after abdominal or pelvic surgery.
These bands may pull, twist, or compress portions of the intestine, potentially creating a blockage. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), abdominal adhesions are the most common cause of small intestinal obstruction.
Hernias
A hernia occurs when tissue or intestine pushes through a weak area in the abdominal wall.
If part of the intestine becomes trapped, it can obstruct the normal movement of intestinal contents and potentially compromise blood supply.
Colorectal Cancer
A tumor within the colon or rectum can gradually narrow the intestinal passageway.
In some patients, symptoms of an obstruction may be one of the first signs that leads to the diagnosis of colorectal cancer.
Symptoms such as unexplained changes in bowel habits, rectal bleeding, abdominal discomfort, or unexplained weight loss should be evaluated, particularly when they persist.
Diverticular Disease
Repeated inflammation associated with diverticulitis can sometimes lead to scarring and narrowing of the colon.
This narrowing, known as a stricture, may eventually interfere with the normal movement of stool through the intestine.
Inflammatory Bowel Disease
Crohn’s disease can cause chronic inflammation and scar tissue that narrows sections of the intestine.
These narrowed areas, called strictures, can cause partial or complete obstruction.
Volvulus
Volvulus occurs when part of the intestine twists around itself.
The twisting can block the intestinal passage and may also restrict blood flow. This condition often requires urgent treatment.
Severe Constipation or Fecal Impaction
In some cases, severely hardened stool can become lodged in the colon or rectum.
This is more common among older adults and people with chronic constipation, limited mobility, or certain medical conditions.
Partial vs. Complete Bowel Obstruction
Partial Obstruction
With a partial obstruction, some food, liquid, stool, or gas may continue to move through the intestine.
Symptoms may include intermittent abdominal cramps, bloating, nausea, changes in bowel habits, and reduced appetite. Symptoms may come and go, which can cause patients to underestimate the seriousness of the condition.
Complete Obstruction
A complete blockage prevents intestinal contents from passing through.
Symptoms are often more severe and may include significant abdominal pain, persistent vomiting, severe bloating, complete constipation, and inability to pass gas.
A complete obstruction requires urgent medical attention.
How Is a Bowel Obstruction Diagnosed?
Diagnosis typically begins with a medical history and physical examination. Your physician will ask about symptoms, previous abdominal surgeries, bowel habits, and medical conditions.
Abdominal X-Ray
An X-ray can sometimes reveal enlarged intestinal loops or abnormal patterns of trapped gas.
CT Scan
CT imaging provides detailed images of the abdomen and can help identify:
- The location of the obstruction
- The severity of the blockage
- Tumors
- Inflammation
- Hernias
- Twisting of the intestine
- Signs of complications
Blood Tests
Blood testing may help identify dehydration, infection, electrolyte abnormalities, or other complications.
Colonoscopy
In certain cases involving the large intestine, a colonoscopy may be used to investigate narrowing, tumors, or other abnormalities. Whether this test is appropriate depends on the patient’s condition and suspected cause.
How Is a Bowel Obstruction Treated?
Treatment depends on whether the obstruction is partial or complete, what caused it, and whether complications are present.
Hospital Monitoring
Many patients require hospitalization so their condition can be closely monitored.
Treatment may initially include:
- Intravenous fluids
- Bowel rest
- Medication
- Correction of electrolyte abnormalities
Nasogastric Tube
A tube may be inserted through the nose and into the stomach to remove accumulated fluid and gas. This can relieve pressure, nausea, vomiting, and abdominal distention.
Treating the Underlying Condition
Some partial obstructions may resolve without surgery, particularly when caused by temporary inflammation or certain adhesions.
Patients still require careful medical monitoring because the condition can worsen.
When Is Surgery Necessary?
Surgery may be required when:
- The obstruction is complete
- Conservative treatment is unsuccessful
- Blood supply to the intestine is compromised
- Part of the bowel becomes damaged
- A tumor is causing the blockage
- A hernia traps part of the intestine
- Volvulus is present
- A perforation develops
The specific procedure depends on the underlying problem.
A colorectal surgeon may need to remove the blockage, repair the affected intestine, remove a diseased section of bowel, or treat the condition responsible for the obstruction.
Why an Untreated Bowel Obstruction Can Be Dangerous
An intestinal obstruction can create increasing pressure inside the bowel.
If pressure becomes severe, blood flow to part of the intestine may be reduced or completely interrupted. Without adequate blood flow, intestinal tissue can become damaged or die.
Potential complications include intestinal perforation, infection, peritonitis, tissue death, and sepsis. These complications can become life-threatening and require emergency treatment.
When Should You Seek Immediate Medical Attention?
Certain bowel obstruction symptoms should be treated as urgent warning signs.
Seek immediate medical care for:
- Severe or worsening abdominal pain
- Persistent vomiting
- Significant abdominal swelling
- Inability to pass stool or gas
- Fever with abdominal pain
- Blood in the stool
- Dizziness, weakness, or signs of dehydration
Do not attempt to manage severe symptoms at home with laxatives unless instructed to do so by a medical professional. If a physical blockage is present, certain treatments may be inappropriate or potentially harmful.
Can a Bowel Obstruction Be Prevented?
Not every obstruction is preventable, but managing certain underlying conditions may reduce risk.
- Managing chronic constipation
- Following treatment recommendations for inflammatory bowel disease
- Seeking care for persistent changes in bowel habits
- Maintaining regular colorectal cancer screening
- Discussing unexplained abdominal symptoms with a physician
- Following postoperative instructions after abdominal surgery
Patients who have previously experienced an intestinal obstruction should also understand their individual risk of recurrence.
Frequently Asked Questions
What are the first signs of a bowel obstruction?
Early symptoms may include abdominal cramping, bloating, nausea, constipation, and changes in the ability to pass gas. Symptoms vary depending on whether the obstruction is partial or complete.
Can you still poop if you have a bowel obstruction?
Yes. A person with a partial obstruction may still pass stool or gas. With a complete obstruction, bowel movements and gas are more likely to stop entirely.
Where does bowel obstruction pain occur?
Pain may occur throughout the abdomen rather than in one specific location. It may initially come in waves and become more persistent if the obstruction worsens.
How serious is a bowel obstruction?
A bowel obstruction can become very serious. A complete blockage can damage the intestine, compromise its blood supply, or cause perforation and infection.
Can constipation cause a bowel obstruction?
Severe constipation and fecal impaction can sometimes create an obstruction, particularly in older adults or individuals with certain medical conditions.
Does every bowel obstruction require surgery?
No. Some partial obstructions can improve with bowel rest, IV fluids, decompression, and medical monitoring. Surgery may be necessary for complete obstructions, complications, or blockages that do not resolve with conservative treatment.
How do doctors know if you have a bowel obstruction?
Doctors may use a physical examination, medical history, blood tests, X-rays, and CT imaging to determine whether an obstruction is present and identify its cause.
Final Thoughts
Knowing the warning signs of a bowel obstruction can help patients recognize when abdominal symptoms require more than routine home care. Pain, bloating, vomiting, constipation, and inability to pass gas can indicate that something is preventing normal movement through the digestive tract.
Because bowel obstruction symptoms can range from mild to potentially life-threatening, persistent or severe symptoms should be evaluated promptly.
RS Surgical provides specialized evaluation and treatment for colorectal conditions that can contribute to intestinal obstruction. Identifying the underlying cause is essential for determining the safest and most effective treatment.
Schedule a Consultation With RS Surgical
If you are experiencing ongoing changes in bowel habits, unexplained abdominal symptoms, or have been diagnosed with a colorectal condition that may require surgical treatment, contact RS Surgical to schedule a consultation.
For severe abdominal pain, persistent vomiting, significant swelling, or an inability to pass stool or gas, seek emergency medical attention rather than waiting for a routine appointment.