Q: My child has a low body temperature and excessive sweating after Roseola. Should we go to the ER?
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 child had a high fever for 5 days due to Roseola. After the fever broke and the rash appeared, their body temperature has remained abnormally low. During the day, their temperature is mostly normal, but while sleeping, they sweat excessively and their temperature drops to 35.2–35.8°C. I dressed them in thick clothes and used a heating pad, but should I remove it because of the sweating? I had to change their clothes three times yesterday alone. Is this an emergency, and do I need to take my child to the emergency room?
Answer:
It is very understandable to be worried about your child's low body temperature after recovering from Roseola.
Temporary body temperature fluctuations are very common after this illness. If your child is eating well, playing normally, and urinating adequately, their temperature will most likely return to normal within a few days.
What you can do at home right now:
• Stop over-bundling: Sweating heavily actually interferes with the body's ability to regulate temperature. Please remove the heating pad and dress your child in their usual, breathable clothing.
• Change sweaty clothes immediately: Wet clothes will cause the body temperature to drop even further, so keep them dry.
• Maintain a comfortable room environment: Keep the room temperature between 22–24°C and the humidity around 40–60%.
• Provide adequate hydration and nutrition: Offer breast milk, formula, or water frequently in small amounts to replenish lost fluids.
When to visit the Emergency Room:
Seek immediate emergency medical care if you observe any of the following signs:
• The child is difficult to wake up, unresponsive, or severely lethargic.
• Their lips, hands, or feet turn blue, or the child feels very cold and is continuously shivering.
• There has been no urination for more than 8 hours.
• Breathing is unusually rapid or appears difficult.
When to consult your pediatrician:
• The low body temperature persists for more than 48 hours.
• The temperature drops below 35.0°C.
• The child is unusually lethargic or refusing to eat.
• A new fever or other new symptoms appear.
For now, remove the excessive layers and focus on managing the sweating by keeping their clothes dry. Monitor your child's condition closely, and seek in-person medical evaluation promptly if any of the warning signs mentioned above appear.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
