Diarrhoea is the passing of loose or watery stools three or more times in a 24-hour period.
It is a symptom, not a disease. Something underneath is driving it, whether that is an infection, a medication, food, stress or a chronic condition.
Globally, diarrhoeal diseases caused an estimated 1.17 million deaths in 2021, and yet most people treat an episode as a minor inconvenience rather than a signal worth paying attention to.
Your gut houses a complete nervous system with 400-600 million neurons called the Enteric Nervous System, which is in constant dialogue with your brain. When something disrupts that communication, diarrhoea is often one of the first signals your body sends.
After 16 years with Crohn's Disease, I learned the hard way that your gut is always trying to tell you something. Listening to it changed everything for me.
This guide covers the different types of diarrhoea, what causes it, the symptoms and warning signs to look out for, and natural strategies to manage and support your gut.
Types of Diarrhoea
| Type | Duration | Common Cause | Key Consideration |
| Acute | 1 to 3 days | Viral/bacterial infection, food poisoning | Usually self-resolving |
| Persistent | 2 to 4 weeks | Lingering infection, digestive disruption | May need investigation |
| Chronic | 4+ weeks | IBS, Crohn's, UC, coeliac disease | Requires medical assessment |
Acute diarrhoea is by far the most common form and typically resolves without treatment.
Persistent and chronic diarrhoea signal something deeper. Chronic diarrhoea often points to an underlying condition such as IBS, Crohn's disease, ulcerative colitis or coeliac disease.
Identifying which type you are dealing with shapes your entire response.
Common Symptoms of Diarrhoea
The most frequent symptoms include loose or watery stools, abdominal cramping and pain, bloating, nausea and urgency.
When it comes to dehydration warning signs, watch for dark urine, dry mouth, dizziness, excessive thirst and fatigue. Dehydration is the primary reason diarrhoea becomes dangerous, particularly in children and older adults.
If diarrhoea lasting more than three days, blood in stool, high fever, severe dehydration, persistent vomiting or unexplained weight loss are red flag symptoms that require medical attention.
These may indicate inflammatory bowel disease, coeliac disease or an infection requiring treatment.
Understanding the symptoms helps you respond. Understanding the cause helps you prevent it from coming back. So let's look at what triggers diarrhoea in the first place.
What Causes Diarrhoea?
Infections are the most common cause globally.
Norovirus alone accounts for roughly one in five diarrhoea cases worldwide and is now recognised as the leading cause of acute gastroenteritis across all age groups. Bacteria (salmonella, E. coli), parasites (giardia) and contaminated food or water are also key drivers.
Medications, particularly antibiotics, are a major trigger.
Antibiotic-associated diarrhoea affects 5 to 30% of patients either during treatment or up to two months afterwards, because antibiotics disrupt the gut microbiome by killing beneficial bacteria alongside harmful ones. Antacids, metformin and proton pump inhibitors can also trigger episodes.
Food intolerances and diet play a significant role.
Lactose intolerance causes osmotic diarrhoea when unabsorbed lactose draws water into the intestinal lumen. Gluten sensitivity, artificial sweeteners like sorbitol, and high-FODMAP foods are other common dietary triggers.
Chronic digestive conditions including IBS (particularly IBS-D), inflammatory bowel disease, and gut microbiome dysbiosis can all cause recurring diarrhoea.
Stress and the gut-brain connection directly alter gut motility through the vagus nerve. Stress hormones like cortisol accelerate intestinal contractions, triggering urgency and loose stools.
Research shows the prevalence of gut-brain interaction disorders has risen significantly post-pandemic. This creates a vicious cycle where stress triggers gut symptoms and gut symptoms amplify anxiety.
How to Manage Diarrhoea Naturally
Rehydration and Dietary Support
Oral rehydration solutions (ORS) are the most effective first-line response to replace lost fluids, salts and sugars.
Supportive fluids include clear broths, coconut water, and plain water in regular small sips. Avoid caffeine, alcohol and high-sugar drinks.
The BRAT approach for food works well during recovery: bananas (potassium replacement), white rice (binding and gentle), applesauce, plain toast. These are low-fibre foods that are easy to digest during active episodes.
Eat smaller, more frequent meals. Avoid dairy, fatty foods and spicy meals during active episodes. Gradually reintroduce your normal diet as symptoms settle.
Gut-Supportive Plants and Probiotics
Probiotics help restore beneficial gut bacteria, particularly after antibiotic-related diarrhoea. A meta-analysis found antibiotic-associated diarrhoea in 8% of the probiotic group versus 17.7% in the control group.
Fermented foods like plain yoghurt and kefir (if tolerated) support microbial recovery.
Ginger helps reduce intestinal spasms and nausea. Chamomile is effective for calming intestinal inflammation.
For long-term gut resilience beyond acute episodes, Cosmic Hue combines seven gut-supportive plants into one daily tea.
Marshmallow root coats and calms the digestive tract, fennel seed relieves bloating and supports digestion, and ashwagandha lowers stress-driven gut disruption. The full formula works across multiple gut mechanisms at once.
This kind of consistent daily support is what I built my own recovery around after 16 years with Crohn's Disease.
Lifestyle and Stress Management
Consistent sleep patterns support your gut's circadian rhythm. When you sleep and wake at roughly the same time each day, your digestive system finds its natural rhythm and functions more efficiently.
Regular gentle exercise promotes healthy motility. Walking, yoga and swimming all encourage your digestive muscles to keep things moving smoothly. Even 20 to 30 minutes of movement each day can make a noticeable difference in how your gut feels.
Stress management through calming routines and breathwork addresses the gut-brain connection directly, reducing how often and how severely symptoms flare.
FAQs
What should you eat and drink when you have diarrhoea?
ORS, clear broths, coconut water and plain water for hydration. Follow the BRAT approach for food: bananas, rice, applesauce, toast. Avoid caffeine, alcohol, dairy, fatty and spicy foods until symptoms settle. Reintroduce your normal diet gradually.
Once the acute phase settles, a daily cup of Cosmic Hue can support longer-term gut recovery with marshmallow root and fennel seed.
How long does diarrhoea normally last?
Acute cases typically resolve within one to three days. Persistent diarrhoea lasts two to four weeks. Anything beyond four weeks is chronic and should be assessed by a healthcare professional to rule out conditions like IBS, IBD or coeliac disease.
Is it better to let diarrhoea run its course?
In many acute cases, yes. Diarrhoea is the body clearing harmful pathogens.
Anti-diarrhoeal medications like loperamide can provide short-term relief, though some healthcare professionals recommend caution during active infections as these medications may slow the body's natural clearance process.
The priority is always hydration and gut support, not simply stopping symptoms.
Can stress cause diarrhoea?
Yes. Your gut and brain communicate directly via the gut-brain axis. Stress hormones accelerate intestinal contractions, triggering urgency and loose stools. Managing stress is a core part of managing gut health long-term.
Conclusion
Diarrhoea is a symptom, not a disease, and understanding its type and cause is the first step to responding effectively.
Staying hydrated, following the BRAT approach during active episodes, restoring your microbiome with probiotics, and managing stress all help your gut recover and stay resilient long-term.
Cosmic Hue supports this process by combining seven gut-supportive plants into one daily ritual, calming your digestive tract, easing bloating and reducing the stress that often triggers flare-ups.
It is a simple yet powerful addition to your daily gut health routine.
Author: Manny is the founder of Fifth Ray and a certified Gut Health Coach. After battling Crohn's Disease for 16 years, he transformed his gut health through plant-based healing. His story has been featured on BBC, ITV, and Daily Mail.
Disclaimer: This information is for education only. Cosmic Hue is not intended to diagnose, treat, cure, or prevent any disease. Always speak to your healthcare provider before changing your routine.
References
Barbut, F., & Meynard, J. L. (2002). Managing antibiotic associated diarrhoea. BMJ, 324(7350), 1345–1346. https://pmc.ncbi.nlm.nih.gov/articles/PMC1123310/
Blaabjerg, S., Artzi, D. M., & Aabenhus, R. (2017). Probiotics for the prevention of antibiotic-associated diarrhea in outpatients: A systematic review and meta-analysis. Antibiotics, 6(4), 21. https://pmc.ncbi.nlm.nih.gov/articles/PMC5745464/
Capece, G., & Tobin, E. H. (2025). Norovirus. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK513265/
Centers for Disease Control and Prevention. (2024). Norovirus facts and stats. U.S. Department of Health and Human Services. https://www.cdc.gov/norovirus/data-research/index.html
Fleming, M. A., 2nd, Ehsan, L., Moore, S. R., & Levin, D. E. (2020). The Enteric Nervous System and Its Emerging Role as a Therapeutic Target. Gastroenterology research and practice, 2020, 8024171. https://doi.org/10.1155/2020/8024171
GBD 2021 Diarrhoeal Diseases Collaborators. (2024). Global, regional, and national age-sex-specific burden of diarrhoeal diseases, their risk factors, and aetiologies, 1990–2021, for 204 countries and territories: a systematic analysis for the Global Burden of Disease Study 2021. The Lancet Infectious Diseases. https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(24)00691-1/fulltext
Koo, H. L., Neill, F. H., Estes, M. K., Munoz, F. M., Cameron, A., DuPont, H. L., & Atmar, R. L. (2017). New insights into the global burden of noroviruses and opportunities for prevention. Expert Review of Vaccines, 16(9), 901–914. https://pmc.ncbi.nlm.nih.gov/articles/PMC5702916/
Nemeth, V., & Pfleghaar, N. (2025). Diarrhea. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK448082/
Palsson, O., Simren, M., Sperber, A. D., Bangdiwala, S., Hreinsson, J. P., & Aziz, I. (2025). The prevalence and burden of disorders of gut-brain interaction (DGBI) before vs after the COVID-19 pandemic. Clinical Gastroenterology and Hepatology. Advance online publication. https://pubmed.ncbi.nlm.nih.gov/40749814/