Gastroenteritis
Gastroenteritis is an inflammation of the stomach and intestines, commonly known as the stomach flu. It is typically characterized by vomiting and diarrhea and usually resolves on its own within a few days.
Overview
Gastroenteritis is an inflammation of the stomach and intestines, commonly known as the stomach flu. It is typically characterized by vomiting and diarrhea and usually resolves on its own within a few days.
Symptoms
Click any symptom to analyzeCauses
- •Viral infections (norovirus, rotavirus)
- •Bacterial infections (Salmonella, E
- •coli)
- •Parasitic infections
- •Contaminated food or water
Risk factors
- •Living in crowded conditions (dorms, nursing homes)
- •Weakened immune system
- •Poor hand hygiene habits
- •Consumption of undercooked or contaminated food
How it progresses
3 stages- OnsetSymptoms appear, often triggered by a known cause.Often missed
- Active phaseSymptoms peak; self-care or short treatment usually helps.
- ResolutionSymptoms ease over days to weeks with proper care.
How it's diagnosed
- •Physical examination
- •Review of symptoms and medical history
- •Stool sample analysis
- •Blood tests to check for dehydration
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Over-the-counter anti-diarrheal medications
- •Probiotic supplements
- •Antibiotics (only if caused by specific bacteria)
- •Drink small, frequent sips of clear fluids
- •Rest the stomach (avoid solid foods for a few hours)
- •Gradually reintroduce bland foods (BRAT diet)
- •Use oral rehydration solutions
- •Fluid replacement therapy
Complications
- •Dehydration
- •Weight loss
- •Nutrient deficiency
- •Recurrence of gastroenteritis
Prevention
- •Wash hands frequently
- •Avoid close contact with infected people
- •Stay up to date with vaccines
- •Eat a balanced, fiber-rich diet
- •Stay hydrated
- •Limit alcohol and processed food
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to gastroenteritis
- Blood in stool or vomit
- Inability to keep liquids down for 24 hours
- Signs of severe dehydration (no urination, sunken eyes)
- High fever above 102 F (39 C)
- Severe abdominal pain
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Gastroenteritis cause weight loss?
- ›Can Gastroenteritis cause headaches?
- ›Is Gastroenteritis reversible?
- ›How quickly does Gastroenteritis progress?
- ›Is Gastroenteritis hereditary?
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Frequently asked questions
Possible causes of Gastroenteritis include Viral infections (norovirus, rotavirus), Bacterial infections (Salmonella, E, coli), Parasitic infections.
Gastroenteritis is generally moderate, but severity can vary. Seek care if symptoms are severe or persistent.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Some milder cases may improve with rest and self-care. If symptoms persist or worsen, consult a healthcare professional.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026