Back to glossary
Digestive
moderate
dog
cat
Diarrhea
Diarrhea is the frequent passage of loose, watery, or unformed stools, often indicating gastrointestinal upset.
Detailed explanation
Diarrhea refers to an increase in the frequency, fluidity, and volume of bowel movements. It's a common symptom of various gastrointestinal disturbances rather than a disease itself. Causes range from mild (like dietary indiscretion or stress) to serious (such as infections, parasites, inflammatory bowel disease, organ dysfunction, or ingestion of toxins). Depending on its origin, diarrhea can be acute (sudden onset) or chronic (lasting more than a few weeks). Symptoms can include loose or watery stools, increased urgency, accidents indoors, blood or mucus in stool, and sometimes vomiting, lethargy, or loss of appetite. While mild, self-limiting cases might resolve with a bland diet, persistent or severe diarrhea, especially with blood, vomiting, or lethargy, warrants prompt veterinary attention to prevent dehydration and identify the underlying cause.
Common symptoms
- Loose/watery stools
- Increased frequency of defecation
- Straining
- Blood/mucus in stool
- Accidents indoors
- Vomiting
- Lethargy
Related conditions
Gastroenteritis
Parasites
IBD
Food allergies
Colitis
Worried about your pet?
Use our free tools to check symptoms, find an emergency vet, or chat with our AI assistant.