What a stoma blockage means
A stoma blockage happens when the normal flow of output is partially or completely interrupted.
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In a partial blockage, some liquid may still pass through
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In a complete blockage, output may stop altogether
With a urostomy, a blockage can affect urine flow, which requires particular attention.
Why blockages can happen
There are several possible causes, and they can differ depending on the type of stoma.
For colostomy and ileostomy
Common causes include:
- Foods that are difficult to digest (such as fibrous vegetables, nuts or corn)
- Food that hasn’t been chewed thoroughly dehydration
- Narrowing of the stoma or bowel (stenosis)
- Scar tissue or adhesions from previous surgery
- Hernias near the stoma
For urostomy
Possible causes include:
- Mucus blocking the stoma opening
- Narrowing of the urinary passage
- Adhesions
- Low fluid intake
Some people may notice that certain foods or situations trigger symptoms more than others.
Signs to be aware of
One of the first things you may notice is a change in your usual stoma output.
This can include:
- Reduced output or no output at all
- Cramping or abdominal pain
- Swelling of the abdomen or stoma
- Nausea or vomiting
- A dry mouth or reduced urine output
- The stoma appearing swollen or changing colour
How symptoms can differ depending on your stoma type
The way a blockage presents can vary depending on whether you have a colostomy or an ileostomy.
With a colostomy, constipation can develop gradually and may last for several days. It is not always immediately noticeable, and in some cases there may be few clear signs at first. This means that a developing blockage can sometimes go unnoticed in the early stages.
Because bowel habits vary from person to person, it can be helpful to pay attention to your usual pattern. If you have not had a bowel movement for three to four days, especially if this is accompanied by discomfort or pain, it’s important to take this seriously.
With an ileostomy, changes often happen more quickly. Output is usually more regular throughout the day, so a pouch that remains empty for several hours can be a sign that something is not right.
For this reason, a sudden lack of output with an ileostomy is often more noticeable and may require more immediate attention.
What you can try at home
If you suspect a mild blockage, there are some steps that may help encourage movement again.
Supporting your body
- Increase your fluid intake (water, tea, or juices)
- Keep gently moving, such as taking short walks
- Try different positions, such as lying down and bringing your knees towards your chest
These steps can help stimulate bowel movement and reduce pressure.
Encouraging the blockage to move
- Gently massage around your stoma
- Apply warmth, such as a hot bath or heat pad, to relax abdominal muscles
- If your stoma is swollen, check that your pouch opening is not too tight
These approaches may help the blockage shift, especially if it is caused
by food.
Adjusting what you eat
- Reduce or pause solid foods temporarily
- Continue to drink fluids
For some people with a colostomy, a healthcare professional may recommend laxatives — but only under guidance.
When to seek medical help
A blockage should never be ignored.
It’s important to seek medical advice if:
- there is no output for 8–12 hours
- abdominal pain becomes more severe
- you are vomiting
- you show signs of dehydration
In these cases, urgent assessment is needed.
What to expect if you need hospital care
If further care is needed, your healthcare team will assess the situation.
This may involve:
- Physical examination
- Imaging such as an X-ray or CT scan
- Blood tests to check hydration
You may receive fluids through a drip, and in some cases, a tube may be used to relieve pressure in the stomach.
Food is usually reintroduced gradually once the blockage has cleared. Surgery is only considered if other treatments are not effective.
Reducing the risk of future blockages
There are ways to help lower the chance of blockages happening again.
You may find it helpful to:
- Chew food thoroughly and eat slowly
- Stay well hydrated
- Be mindful of foods that are harder to digest
- Introduce higher-fibre foods gradually
- Keep a note of foods that trigger symptoms
Over time, this can help you better understand what works for your body.
Taking it one step at a time
A stoma blockage can feel uncomfortable and, at times, worrying. But knowing the signs — and what steps to take — can make a big difference.
If something doesn’t feel right, it’s always best to reach out to your stoma care nurse or healthcare team. Support is there when you need it.
And with time, many people become more familiar with their own patterns — making it easier to manage situations like this with confidence.
FAQ: Stoma blockage
How do you know if your stoma is blocked?
A stoma blockage usually makes itself known through a noticeable reduction or complete absence of output in the pouch, despite eating and drinking as normal. This is often accompanied by abdominal cramping, bloating and a feeling of pressure or fullness in the stomach. Nausea and vomiting can also occur as the blockage progresses. In some cases, watery or unusually liquid output may still pass around a partial blockage, which can be misleading and is sometimes mistaken for diarrhoea. The stoma itself may appear swollen or puffy. If these symptoms persist for more than a few hours or worsen, it is important not to wait and to seek medical advice promptly.
How do you treat a blocked stoma?
For mild blockages, there are several gentle measures that can help encourage things to move again. Drinking plenty of warm fluids — such as water or herbal tea — is often the first step, as hydration helps to soften any obstruction. A warm compress or hot water bottle placed on the abdomen can help relax the bowel, and gentle abdominal massage in a clockwise direction may also encourage movement. Changing position — such as drawing the knees up to the chest or rocking gently — can sometimes help to dislodge a partial blockage. Laxatives should not be taken without medical advice. If symptoms do not improve within a few hours or worsen at any point, medical attention should be sought without delay.
What should I do if I have a stoma blockage?
If you suspect a stoma blockage, it is important to act calmly but promptly. Start by increasing your fluid intake and applying gentle warmth to the abdomen. Avoid eating solid food until the blockage has resolved, as this can make things worse. Do not take laxatives or attempt to manually clear the blockage yourself. If the blockage does not improve within a few hours, or if you experience severe pain, persistent vomiting, a swollen or discoloured stoma, or a complete absence of output for more than four to six hours, go to your nearest emergency department or contact your stoma care nurse immediately. A stoma blockage that is left untreated can become a serious medical situation.
Can a stoma get blocked?
Yes, a stoma can become blocked, and it is one of the more common complications that ostomates may encounter — particularly those with an ileostomy, as the small bowel has a narrower diameter and is more susceptible to obstruction. Blockages are most often caused by certain foods that are difficult to digest, such as mushrooms, nuts, dried fruit, raw vegetables or fibrous foods like sweetcorn, which can clump together and obstruct the stoma opening. Scar tissue or adhesions forming inside the abdomen after surgery can also contribute to blockages. The good news is that many blockages can be prevented with mindful eating — chewing food thoroughly, staying well hydrated and being aware of which foods your body handles well.