Gastroenteritis (Viral Stomach Illness)
Gastroenteritis, often called the “stomach flu,” is a common childhood illness caused by viral or bacterial infection of the digestive tract. It leads to vomiting, diarrhea, abdominal pain, and dehydration, and while usually self-limited, it can be distressing for both children and parents.
At The Medical Group of New Jersey, our pediatricians provide prompt evaluation, hydration guidance, and monitoring to ensure safe recovery. We focus on comfort, preventing dehydration, and helping families recognize when medical care is needed.
Symptom Onset & Initial Evaluation
Symptoms of gastroenteritis typically appear suddenly and may include:
- Nausea, vomiting, or watery diarrhea
- Stomach cramps and abdominal tenderness
- Fever, fatigue, or loss of appetite
- Signs of dehydration, such as dry mouth, reduced urination, or dizziness
Your pediatrician will review your child’s recent food intake, travel, and potential exposures at daycare or school. During the exam, hydration status is carefully assessed by checking pulse, blood pressure, and mucous membranes.
Most cases are viral, commonly caused by norovirus, rotavirus, or adenovirus, but bacterial infections (like Salmonella or E. coli) are also possible.
Diagnosis
At The Medical Group of New Jersey, our pediatricians tailor testing to minimize discomfort while ensuring accurate diagnosis and safe management.
Diagnosis is typically based on symptoms and physical examination. Additional testing may be recommended if:
- Symptoms persist beyond 7–10 days
- Blood or mucus appears in stool
- There are signs of dehydration or high fever
Possible tests include:
- Stool studies for bacteria, viruses, or parasites
- Electrolyte blood tests to evaluate fluid balance in moderate to severe cases
Treatment & Ongoing Management
Most cases of viral gastroenteritis resolve within a few days with supportive care. Treatment and management typically include:
Hydration First
- Offer frequent sips of oral rehydration solutions (ORS) such as Pedialyte.
- Avoid sugary drinks and sodas, which can worsen diarrhea.
- For infants, continue breastfeeding or formula feeding as tolerated.
Nutrition During Recovery
- Reintroduce bland foods slowly—bananas, rice, applesauce, and toast are well tolerated.
- Avoid greasy, spicy, or dairy-heavy foods for several days.
Medications
- Fever or discomfort: Use acetaminophen or ibuprofen (as directed by your pediatrician).
- Anti-nausea medication: May be prescribed for severe vomiting to improve hydration.
- Antibiotics: Only used when bacterial infection is confirmed—most viral cases do not need antibiotics.
Monitoring for Dehydration
Parents should watch for signs of worsening dehydration, including:
- No urination for 8+ hours
- Sunken eyes or soft spot (in infants)
- Persistent vomiting or lethargy
If these occur, contact your child’s pediatrician promptly. The pediatrician may recommend IV fluids or hospital observation to restore balance safely.
Prevention & Family Guidance
Gastroenteritis spreads easily, especially among young children. Preventive steps include:
- Frequent handwashing before meals and after diaper changes
- Disinfecting toys, countertops, and bathroom surfaces
- Avoiding shared utensils or drinks during illness
- Ensuring children are up to date on the rotavirus vaccine
Your pediatrician at The Medical Group of New Jersey will provide specific guidance on when your child can safely return to daycare or school to prevent spreading infection to others.
Follow-Up & Long-Term Outlook
Most children recover fully within a few days with proper hydration and rest. Your pediatrician may schedule a follow-up if:
- Diarrhea or vomiting lasts more than a week
- Symptoms recur frequently
- There are ongoing signs of poor appetite or weight loss
With timely care and preventive strategies, our pediatric team helps children recover quickly and safely, while giving parents confidence in managing future episodes.