Stomach flu means a viral infection of the intestines, primarily causing nausea, vomiting, and diarrhea. Unlike the respiratory flu, it's not caused by influenza viruses but rather norovirus, rotavirus, or adenovirus.
The virus enters the body through contaminated food, water, or surfaces and infects the lining of the small intestine. This disrupts digestion, leading to inflammation and fluid loss. Symptoms typically appear within 12 to 48 hours of exposure and last 1 to 3 days.
Norovirus, the most common cause, spreads easily through close contact or contaminated surfaces. Rotavirus is more prevalent in children and can lead to severe dehydration.
| Virus | Common Symptoms | Duration |
|---|---|---|
| Norovirus | Sudden onset of vomiting, diarrhea, stomach cramps | 1-3 days |
| Rotavirus | Watery diarrhea, fever, vomiting (common in children) | 3-7 days |
| Adenovirus | Mild diarrhea, fever, sore throat | 5-14 days |
Unlike the respiratory flu, which spreads through droplets, stomach flu transmits via fecal-oral routes. Washing hands frequently and avoiding contaminated food reduces risk.
Rest and hydration are critical. Oral rehydration solutions (ORS) replace lost electrolytes. Over-the-counter medications may relieve symptoms, but antibiotics are ineffective since stomach flu is viral.
I once cared for a friend with stomach flu who couldn't keep fluids down. Small sips of an ORS every 15 minutes helped stabilize their condition within 24 hours.
Seek immediate care if symptoms persist beyond 48 hours, blood appears in stool, or dehydration signs (dizziness, dry mouth) worsen. Severe cases may require intravenous fluids.
While stomach flu is unpleasant, proper hydration and rest ensure recovery. Understanding its causes and prevention helps avoid confusion with respiratory illnesses.