Causes of constant diarrhea.

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3 Answers

These messages are for mutual support and information sharing only. Always consult your doctor before trying anything you read here.

How long have you had it? Is there any weight loss? How does the poop look like? Do you have any infections? Constant diarrhea be very tricky. Many diseases could cause diarrhea, such as 

  • Chronic bacterial dysentery; 
  • ulcerative intestinal tuberculosis;
  • intestinal flora imbalance; 
  • colorectal cancer; 
  • ulcerative colitis; 
  • Crohn's disease; 
  • pancreatic malabsorption; 
  • irritable bowel syndrome; 
  • hyperthyroidism.

You need various tests to locate the cause. Some of the tests are:

1. Fecal examination. It's the most basic examination for diarrhea, including appearance, microscopic examination and culture. Microscopic examination should pay attention to the presence or absence of red blood cells, white blood cells, eggs, protozoa, etc. 

2. Blood routine, blood sedimentation, electrolytes, urea nitrogen, carbon dioxide binding and so on. If suspected of gastric diarrhea, gastric juice analysis should be performed. For patients suspected of hyperthyroidism, related tests such as basal metabolic rate, thyroid iodine absorption rate, etc..

3. Absorption function test: D-xylose absorption test, vitamin B12 absorption test, and pancreatic function test.

4. Device examination: X-ray examination. Abdominal signs can show partial intestinal stenosis, calcified gallstone, pancreatic calcification, lymph node calcification and so on. Gastrointestinal barium meal can observe the functional state of digestive tract movement, to understand whether there is organic disease, barium enema is often helpful in the diagnosis of various lesions of the colon. CT and endoscopic retrograde cholangiopancreatography are helpful for the diagnosis of liver, gallbladder and pancreatic diseases. 

Anyway, go to see a doctor.

There are many causes for chronic diarrhea, such as:

  • medications — NSAIDs, antibiotics, antacids
  • diabetes
  • gluten insensitivity
  • alcohol abuse
  • inflammatory bowel disease
  • gastrointestinal infection


A stool sample, which examines feces, may reveal elevated white blood cells. This can be a sign of inflammation in your body or bacteria or parasites in your stool. The latter can also cause loose stools. This sample may also reveal fat in your stool, which can indicate chronic pancreatitis (damage to the pancreas from prolonged inflammation) or celiac disease.

If a blood test or a stool sample can’t identify the cause of diarrhea, your doctor may suggest an ultrasound or CT scan of your abdomen, but only if you have other symptoms like pain or bloody stools. These imaging tests will check your organs for problems. Your doctor may also recommend a colonoscopy to examine your bowels for abnormalities. This tool can diagnose problems with the lining of your intestines, pancreas, and colon.

Crohn's disease is common, people with Crohn's have to take gluten-free diet, otherwise they have diarrhea.

Have you checked for Crohn's disease?
No
I don't know the symptoms, but I've had diarrhea for over a week.
Diarrhea didn't mean you have crohn disease. It's better to have an enteroscopy for a check. Crohn disease can cause diarrhea or constipation, abdominal pain, etc. Patients with severe Crohn disease can also have anal fistula. Go to a gastroenterologist. If your enteroscopy is normal, you can take some medications to improve intestinal microbiome such as Lactobacillus and glutamine to improve intestinal function.
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