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Q: My 6-year-old son has a stomachache, nausea, and severe lethargy. Is it a stomach flu or influenza?
- Myeongchan Kim
- 3 hours ago
- 3 min read
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My 6-year-old son complained of a stomachache early in the morning. He woke up feeling a bit better, but then the pain returned and he felt like throwing up. We went to the clinic, and they suspected a stomach flu (gastroenteritis). He was given an IV drip with stomach-soothing medication and vitamins.
After coming home, he had no appetite, refused to eat porridge, and fell asleep feeling tired. When he woke up, he cried, saying he had absolutely no energy. I thought he was weak from not eating, so I offered him some soup and rice, but he refused that too. He complains of dizziness and severe nausea.
Should I consider this a typical stomach flu, or could it be one of the symptoms of the influenza going around? He has had stomach bugs before, but he never complained of having no energy like this. We haven't done a flu test yet.
Answer:
It must be very worrying to see your child still struggling and lacking energy even after receiving an IV drip.
Current Situation Assessment
Symptoms such as abdominal pain, nausea, loss of appetite, generalized weakness, and dizziness strongly point toward gastroenteritis (the stomach flu), but dehydration or other underlying causes must also be considered. The fact that he is still feeling weak and dizzy despite the IV fluids suggests that his body may still be lacking adequate fluids and electrolytes, or that the illness is actively progressing.
When to Seek Immediate Medical Attention (Urgent Care or ER)
Please take him in for a medical evaluation immediately if any of the following occur:
• No urination for more than 8 hours.
• Signs of severe dehydration: dry lips and tongue, crying without tears, or sunken eyes.
• Extreme lethargy: he is constantly lying down, has difficulty making eye contact, or is hard to wake up.
• Inability to keep even tiny amounts of water down due to repeated vomiting.
• Bloody stool (dark red or bright red) or bilious vomit (green or yellow).
• Abdominal pain that is localized to one specific area and becomes severe when his belly is touched.
• A fever accompanied by a stiff neck, severe headache, or repeated vomiting.
What You Can Do at Home Now
Provide fluids in small, frequent amounts: Give 1–2 teaspoons (5–10 mL) every 5–10 minutes. Use an oral rehydration solution (like Pedialyte), clear broth, or barley tea. Hold off on solid foods for now. If he keeps the fluids down without vomiting, you can gradually increase the amount after 30 minutes.
Prioritize rest: Do not force him to eat. Let him rest comfortably in bed. Have him lie on his side or with his upper body slightly elevated in case he needs to vomit.
Monitor his condition: Keep track of his urine output (color, volume, and frequency). Frequently check if his lips are moist, if he produces tears when crying, and if his overall responsiveness is normal.
Possibility of the flu: Early symptoms of gastroenteritis and influenza can overlap. If his current symptoms are accompanied by a fever, muscle aches, or headaches, the flu is certainly a possibility.
Please consult your pediatrician to discuss whether additional IV fluids or further evaluations are necessary, and to ask when an influenza test would be appropriate. For today, start by offering very small amounts of fluids, and seek in-person medical care right away if you observe any of the warning signs listed above.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
