I had previously written about dealing with thick ostomy output, but many ileostomates have the opposite problem: liquid output. In this post, I’d like to go over a few tips that you can use to thicken up your output. These tips apply to colostomates who have loose stools but are directed more towards ileostomates.
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Why Worry About Liquid Or Loose Output?
For the most part, there’s nothing really wrong with having liquid or loose output, but it does come with a few challenges:
- liquid output is more likely to cause leaks.
- liquid output can shorten the life of your wafer by speeding up erosion.
- liquid output can clog pouch filters and/or leak through them.
- emptying a pouch full of liquid can be messy (especially if you have mobility issues).
- liquid output could lead to dehydration more easily.
- a high-output stoma could mean that nutrients don’t have time to be properly absorbed.
- you may need to empty your pouch more often than you’d like.
Causes of Liquid Ostomy Output
Ostomates with Short Bowel Syndrome are more prone to having liquid output with fast transit of their food through their small intestine, but there are other reasons which can cause it too.
Here are a few of the more common causes:
Dietary
The following foods and beverages can cause a dramatic change in your output’s consistency. You’ll likely be able to identify the culprit within hours of consuming them:
- Coffee or tea
- Sport drinks
- Soda/Pop/Soft drinks (both diet and regular )
- Fruit juices
- Chocolate
- Certain fruits (for me, it’s cherries)
- Artificial sweeteners
- Alcoholic beverages (especially wine)
- Fried foods
- Hot/spicy foods
- Non-vegan foods like dairy (or other lactose-containing food, if lactose intolerant)
For the most part, very few of the items listed are needed (or desired) in a healthy diet, so if you can cut them out, you’ll find benefits in more than one way.
Drinking with meals or drinking too much at one time can loosen your output too.
Laxatives, Medication & Supplements
Some medication or supplements can cause our output to become loose. If you are taking a laxative, it may also cause loose stools.
Antibiotics can cause liquid output (diarrhea) that tends to pass within a few days. You may be asked to take a probiotic while you are on antibiotics to help balance out your gut flora. Keep in mind that you should never stop taking antibiotics until you’ve completed the full course.
Viral or Bacterial
There are many types of bacteria and viruses that can cause diarrhea or liquid output. If you’ve experienced an unusual change in your output, you may fall into this category.
Blockage
When you experience a blockage, your body will try to flush out the blockage, which can result in liquid output.
I didn’t have this at all for my last blockage, but many ostomates report having liquid output while they were obstructed.
This will usually be accompanied by other symptoms that are typical for a blockage like abdominal pain, pain with peristalsis (this comes in waves as your gut tries to move things along), nausea and possibly vomiting.
If you suspect a blockage, you’ll want to contact your GI or head to your local ER.
For tips on preventing and dealing with blockages, see THIS article.
Tips for Dealing With Liquid Output
Talk to your doctor if you suspect food poisoning or another bacterial/viral cause of your liquid output. As suggested above, if you suspect a blockage, you’ll want to contact a medical professional.
For “normal” causes, you might want to try the following tips:
Dietary
One of the most effective ways to deal with liquid output is to make a few dietary changes or modify the way you eat.
Keeping your meals and beverages separate, or drinking throughout the day (rather than in one sitting) can help.
The following foods are also known to thicken ostomy output:
- Starchy foods like pasta, potatoes, rice, white bread
- Crackers
- Potato chips
- Applesauce
- Bananas (especially when under ripe and without spots)
- Nut butters (peanut, almond, sunflower seed, etc)
- Oatmeal
Most of these foods can be considered healthy, although, don’t depend too much on the white bread, white pasta or chips if you don’t need to.
I remember one fellow I spent a hospital room with had to consume several bags of potato chips plus Imodium to slow his output down because of his short bowel.
Gelling agents
A popular choice among ostomates is to use gelling agents in their pouch.
These can come in tablets, powder, capsules (usually made with animal ingredients) or sachets, but they all work in a very similar fashion: Add the gelling product to your pouch as directed and it will thicken up when it comes in contact with your output.
Here’s a demo of how gelling products work:
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I’ve reviewed the ConvaTec Diamonds sachets, but I’ve also tried other products and they generally work well. You should be able to get samples to try.
Anti-Diarrheal Medication
Many ostomates will be told by their doctor or stoma nurse to take a product like Imodium to slow down their output. I would personally try this last if all other options failed, however, if you have a very high-output stoma which is causing ongoing nutritional problems or dehydration, this might be an option you’ll want to try until things get stabilized.
Fibre Supplements
This is not an option I’d recommend, nor is it something that your doctor is likely to recommend either. There are fibre supplements which can bulk up stool but they carry a risk of causing a bowel obstruction too. Do not try this unless explicitly told by your doctor.
Guar Gum
Guar gum is made from guar beans, but it’s been used as a thickening agent in various products for quite some time. There are claims that it has eight times the water-thickening effect compared to cornstarch, which is pretty impressive!
As a supplement, this often comes in tablets, but you should consult with your doctor to see if it’s a good option for you. Like fibre supplements, there’s a risk of slowing things down too much.
Consider Using a High-Output Appliance
If you find that your liquid output is difficult to manage when you’re wearing a traditional ostomy pouch, consider a high-output appliance.
These styles of pouches have larger capacities and are designed to better manage liquid output.
The product in the photo above is one of Coloplast’s high-output appliances. I did an overview of them HERE, and it may be an option worth considering.
Closing Thoughts
Some ostomates don’t mind liquid or loose output.
But if you’re one of the people who find liquid output to be problematic, then I hope the suggestions listed will come in handy.
In addition to the tips included above, you may also want to try using barrier rings or moldable wafers to help prevent liquid output from leaking under your appliance.
QUESTION: What do you do to thicken your output?





Great job my friend! You were outstanding in the presentation. I have short bowel from too many surgeries because of UC. I have had tons of problems with excessive out put. Your info will work even for those of us with excessive out put. I guess i am giving up coffee!!!!!
God Bless
If you love coffee, enjoy it. It’s expected that you’ll have excessive output with a short bowel, but unless coffee is making it substantially worse, I wouldn’t remove it. Do an experiment for a week and keep a log of how much coffee you drink vs how much output you have and see if it makes a difference if you stop.
I would continue to use what works for odor control. Don’t worry about what color it turns things as it’s not harmful in any way. 👍
I have advanced to using a bottle from the stoma powder to keep my M9 drops in and I count it out because at the 40 $ a month, I can not do that twice. It is worth it to count the 20 drops into the bag. If you have eaten something causing a stronger odour, you can 2 more and it nips it in the stoma. I refuse to do without it also,this was a life changer as in I was no longer afraid to leave the house, and had always asked if my hubby and then my son…do I stink??? I always felt I stank. A very normal question with a new pouch system. All the best!
I would suggest keeping a food list of what may have been eaten about the time the black appeared. That was how I figured it out for myself. When I asked the GP about it, he did not think that there was enough time for a mold to form being an ostomy. Even when rinsing the pouch there is not enough to form the mold. Sticky foods….sauces, pasta, carrots, potatoes…now I want scalloped potatoes for supper loaded with onions….I digress…just keep a check on the foods and I am sure it will all make sense. No, you are not alone, I get it all the time too. Try scrubbing the inside of the bag by adding some M9 and rubbing the sides together kind of hard but too hard and then when your done, if the colour is still there, that is the stain from food colours. Peas are another culprit red grapes will stain black with the m9 and acids you produce too. Trial and error. I hope this helps.
How much are you putting in your bag? It can change the color of your output, but it depends how many drops you use. I squirt M9 into my bag, but the suggested amount is only several drops, which shouldn’t discolor too much .
@veganostomyI use just one small squirt, which I estimate to be perhaps 20 drops. Maybe I will try just letting 10 drops fall into the bag and see if that makes a difference; as I recall I started with a few drops at first when I got a bottle of M9 and then increased to that small squirt. This might be my body chemistry reacting with the ingredients in M9 – it is a curious thing but the drops were life-changing, the only product that worked, and I don’t plan to stop using them. Thank you everybody for your ideas and suggestions.
So I am the only person gets this charcoal-gray-to-black that sometimes looks like black mold to wherever the M9 reaches in my bag? I had some scary stuff going on this past summer and had many tests so I am reasonably sure it is not caused by blood – plus, where the M9 does not touch the output is just brown. Every body is different, I know.