Q: My 8-month-old is recovering from a stomach bug but has a low body temperature (35°C), pale lips, and low urine output. Is this normal?
- Myeongchan Kim, MD
- 1 hour 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 8-month-old baby had gastroenteritis with a fever, diarrhea, and vomiting for about a day and a half. Yesterday morning, I switched to a diarrhea-specific formula, gave the prescribed medications, and alternated fever reducers. Since last night, the severe symptoms have improved. The stool is firmer (though not completely back to normal), the frequency is normal, and there is no more vomiting.
However, last night, my baby's temperature dropped to the 35°C (95°F) range with cold sweats. I kept them warm and changed their clothes whenever they sweat, and the temperature came back up to 36°C (96.8°F). But this morning, the temperature is back in the high 35°C range, and their lips look slightly pale. Their overall condition is at about 70-80% compared to usual.
What worries me most is that their urine output is very low. I am feeding them smaller amounts more frequently, but the lack of wet diapers and the low body temperature have me concerned. They are also sweating slightly. Are these signs of recovery, or is something else going on?
Answer:
You have done a great job caring for your baby during this stomach bug.
Current Situation Summary
While it is good news that the diarrhea and vomiting have decreased and stool frequency has returned to normal, the combination of a low body temperature (35°C range), decreased urine output, and pale lips is concerning and needs attention.
When to See a Pediatrician Today
If any of the following apply, please visit your pediatrician or an urgent care clinic today:
No urine output for 6 to 8 hours or more.
Dry lips, dry tongue, or crying without tears.
Temperature consistently staying in the 35°C range, or the baby seeming lethargic and slow to respond.
Eating less than half of their usual amount for over 24 hours.
Recurrence of high fever (38°C/100.4°F or higher), repeated vomiting, or bloody stools.
What You Can Do at Home Now
Prioritize Hydration: Offer an Oral Rehydration Solution (ORS), like Pedialyte, in small amounts frequently. Try giving 5 to 10 mL every 5 to 10 minutes. Giving too much at once can trigger vomiting, so "slow and frequent" is the key.
Monitor Temperature and Urine: Keep track of wet diapers (aiming for at least one wet diaper every 6 hours). Check the baby's temperature every 2 to 3 hours to ensure it stabilizes above 36°C (96.8°F).
Maintain Body Warmth: Keep the room temperature comfortable (22-24°C / 71-75°F) and dress the baby in a few thin layers. Continue changing their clothes immediately if they get damp from cold sweats.
Gradually Increase Feeding: Start by offering half the usual amount of the diarrhea formula, increasing it gradually 1 to 2 times a day. If there is no vomiting and the stool continues to improve, you can discuss transitioning back to regular formula with your doctor in 2 to 3 days.
When to Go to the Emergency Room
Go to the nearest ER immediately if you notice:
Lips turning blue or shortness of breath.
Extreme difficulty waking the baby or a lack of responsiveness.
Temperature dropping below 35°C (95°F) or the body feeling unusually cold.
Next Steps
Although the initial stomach bug symptoms are improving, your baby is showing clear signs of dehydration (low urine, low temperature, and pale lips). Please contact or visit your pediatrician today to have your baby's hydration status professionally evaluated. If you visit an urgent care or ER outside of regular hours, remember to bring your baby's current medication records (names and dosages) with you.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
