Research digest — not medical advice. Full disclaimer · How we rate evidence
Red Flags
If you experience these, seek immediate medical attention.
- •Signs of severe dehydration
- •Blood or pus in stool (black or tarry stool)
- •Severe abdominal pain
- •High fever
Overview
Diarrhea is usually caused by a virus or contaminated food. It can cause dehydration.
Possible Causes
Viral Gastroenteritis
Stomach flu.
Food Intolerance
Lactose intolerance, etc.
IBS
Functional bowel disorder.
Home Care
- Hydration with electrolyte solutions.
- Bland "BRAT" diet (Bananas, Rice, Applesauce, Toast).
- Avoid dairy.
Research cited
Sources for this page are being compiled. Each research summary on Body Signals is backed by peer-reviewed literature — source links will be added as part of our ongoing editorial review.
Sidebar
When to see a doctor
- •Diarrhea > 2 days in adults.
- •Bloody or black stool.
- •Severe pain.
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Medical Disclaimer
This is a research summary, not medical advice. Body Signals is an independent research digest — it summarises published research for informational purposes and is not a healthcare provider. Consult a qualified healthcare provider before making changes to diet, exercise, supplements, or medication — especially if you have existing conditions or take prescription drugs.