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Diarrhea vs Constipation


goatmanvevo

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goatmanvevo Newbie

I’ve had chronic constipation for years, and it got worse when about 5 months ago I’d also have blood on the stools (typically medium to bright red and a smallish amount). I got diagnosed with celiac a little over a month ago and have been gluten free since then. Yesterday, I had diarrhea for the first time in years, and it’s happened a few times since then. I know diarrhea can be a symptom of celiac, but in my case, is this possibly a sign of healing given the change? Also, why does celiac cause constipation for some and diarrhea for others? Is it common for it to switch like this?


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Scott Adams Grand Master

It's great that you're seeing changes after going gluten-free! Diarrhea can indeed be a symptom of celiac disease, especially during the initial stages of gluten elimination. It might indicate your body's response to the dietary change and the healing process underway. Celiac disease can affect people differently, causing constipation in some and diarrhea in others. This variation can occur due to factors like individual sensitivity levels, gut microbiota, and immune responses. It's not uncommon for symptoms to shift as your body adjusts to the gluten-free diet and begins to heal.

 

knitty kitty Grand Master

@goatmanvevo

You may want to keep a food-mood-poo'd diary.  Tracking irritating foods is much easier with a diary and helpful to doctors and nutritionists.  

Sometimes while healing we can react to other foods.  Eggs, soy, and other grains like corn may be difficult to digest and may provoke gastrointestinal symptoms.  Lactose intolerance or a reaction to Casein is possible and can cause diarrhea.  

Chronic constipation can be a symptom of magnesium and thiamine deficiencies.  Supplementation with a B Complex and minerals like magnesium to boost your absorption is beneficial.  Discuss checking for deficiencies with your doctor.  

Keep us posted on your progress!

Mari Contributor

Hi Goatmanvivo,

When I worked in medical labs we would examine fecal samples routinely noting the color, consistency and whether there was any blood or undigested food observed. Fresh blood as you described  was noted as was an occult blood test reported. Fresh blood is usually from the large intestine and older (occult) blood is an indication that the blood becomes mixed with the feces much higher in the intestine and has lost its bright red color. Health providers are always interested when any blood is seen in a person's stool and will want to find out why it is there. Just because you have celiac disease does not mean you should ignore this. 

 

I also had and still have problems with constipation. It is easier to deal with when it is large intestine constipation because I can use a magnesium supplement  either increasing my usual amount or using Milk of Magnesia. When I have inflammation in my small intestine I use a herbal laxative. Magnesium draws water into the large intestine only. Herbal laxatives increase the mobility of feces in the whole intestine. The herbal laxatives tend to become addictive so are used occasionally. I have also found it helps to drink more water. Just plain water.

 

Hope this helps.

brian1 Newbie

I had this but I did not get it all the time I got constipation when stopped  gluten so I started eating more bananas and tried a couple doses of movicol this seemed to make my motion worse and gooie like I was advised by a doctor to stop the banana an movicoland see what happens you cannot seem to win I also beleave gluten-free foods deplete the b vitamins in the body and brain it explains a lot of things

brian1 Newbie

I don't know about the healing though

knitty kitty Grand Master
9 hours ago, brian1 said:

I also beleave gluten-free foods deplete the b vitamins in the body and brain it explains a lot of things

Yes, gluten free processed foods are not required by law to be enriched or fortified with essential vitamins lots during processing like gluten based processed foods are.  

Plus gluten free processed foods are made with lots of added sugars, and saturated unhealthy fats which require higher doses of Thiamine to turn into energy for our bodies.  

Hiding in Plain Sight: Modern Thiamine Deficiency

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8533683/

@Mari,

Taking additional thiamine (benfotiamine) will help improve constipation and gut motility.  


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      It sounds like you’re doing an amazing job helping your daughter navigate her new gluten-free lifestyle—it can be a big adjustment, especially for little ones! To address your questions: Increased bowel movements: It’s possible her digestive system is beginning to work better now that she’s gluten-free, and she’s clearing out what wasn’t moving before. Chronic constipation and impaction can take time to resolve fully, and daily Movicol might still be helping this process. Over time, her bowels should normalize as her gut heals, but if the frequent stools persist or seem excessive, it’s worth checking with her doctor to rule out other issues like malabsorption or food intolerances. Pinkish stool color: Changes in stool color can be common after diet changes, but pinkish stools should be monitored closely. If it’s not blood and doesn’t seem to bother her, it could just be due to something she’s eaten—like certain fruits, vegetables, or food dyes. However, if the color persists, worsens, or is accompanied by other symptoms, definitely mention it to her doctor to rule out any underlying concerns. Bloated tummy: A distended tummy from celiac disease can take time to go down as her gut lining heals and inflammation reduces. It varies for every child, but improvements are often seen within a few weeks to months of being strictly gluten-free. Staying consistent with the diet and ensuring she gets all the nutrients her body needs—especially iron, zinc, and B vitamins—will support this process. If the bloating doesn’t seem to improve or worsens, her doctor may want to investigate further. It’s still early days, so keep doing what you’re doing and stay patient with her progress. Keep track of her symptoms, and don’t hesitate to bring up any concerns at her follow-up appointments. Recovery can be a slow process, but most kids with celiac thrive once their gut heals. Sending lots of positive thoughts your way—she’s lucky to have you looking out for her!
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