Seek prompt medical care for persistent diarrhea, high fever, repeated vomiting, very frequent stools, severe pain, blood or black stool, dehydration, confusion, or inability to drink enough fluids.
Self-care guide
Acute diarrhea
A sudden increase in loose or watery stools, commonly caused by a short-lived infection, food-related illness, medicine effect, or another temporary digestive upset.
Step 1 · First-line care
What to do first
For mild uncomplicated acute diarrhea, the priority is replacing lost fluids and electrolytes with water, broths, electrolyte-containing fluids, or oral rehydration solution (ORS). Resume a normal diet as appetite returns. Herbal options are secondary and are limited here to traditional symptomatic-use preparations; they do not treat dehydration or replace cause-specific care.
Step 2 · Safety
When to get medical help
Seek emergency care for sudden severe abdominal pain, severe breathing difficulty, marked confusion or unresponsiveness, or vomiting blood.
Extra caution: Infants and children, pregnancy, older adults, immunocompromised people, and people with kidney disease, diabetes, or other conditions may need individualized rehydration and earlier medical review. Over-the-counter antidiarrheals are not appropriate for everyone, especially with blood in stool or fever.
Step 3 · Optional ingredient support
For relief now
These options have been reviewed for evidence and key safety concerns.
Tormentil
Traditional short-term symptomatic relief of mild acute diarrhea in adults using a tormentil preparation that follows medicinal-product directions.
How it is used: Hydration comes first. Use only an appropriately labeled tormentil product or monograph-aligned preparation; stop self-care and seek assessment if symptoms worsen or continue beyond 3 days.
What does this evidence mean?
Tormentil has recognized traditional use for mild diarrhea. This is based on long-standing use rather than strong modern clinical trials.
Evidence may apply to one specific form of an ingredient — a capsule, extract, cream, or tea — and to a particular amount. Recipes and everyday foods may not match the form or amount that was studied.
Dried Bilberry Fruit
Traditional short-term symptomatic relief of mild diarrhea using dried-bilberry-fruit preparations.
How it is used: Use a clearly identified dried-bilberry-fruit medicinal preparation; ordinary fresh blueberries or fresh bilberry extracts do not automatically inherit this claim. Seek care if symptoms persist beyond 3 days.
What does this evidence mean?
Dried bilberry fruit has recognized traditional use for mild diarrhea, but clinical-trial evidence is insufficient.
Evidence may apply to one specific form of an ingredient — a capsule, extract, cream, or tea — and to a particular amount. Recipes and everyday foods may not match the form or amount that was studied.
Agrimony
Traditional short-term symptomatic relief of mild diarrhea using oral agrimony preparations.
How it is used: Use a labeled oral agrimony preparation and keep oral rehydration as the main self-care measure. Seek care if diarrhea persists beyond 3 days or earlier if red flags appear.
What does this evidence mean?
Agrimony has recognized traditional use for mild diarrhea. The claim reflects long-standing use, not established modern efficacy.
Evidence may apply to one specific form of an ingredient — a capsule, extract, cream, or tea — and to a particular amount. Recipes and everyday foods may not match the form or amount that was studied.
For ongoing support
These options are better suited to regular or longer-term use than to quick symptom relief.
No reviewed options in this category yet.