Q: My 20-month-old baby has recurrent high fevers up to 41°C after pneumonia. Should we wait to see the doctor?
- Myeongchan Kim, MD
- Jul 11
- 3 min read
Updated: Jul 21
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 20-month-old baby has been experiencing recurrent high fevers. The fever started a few days ago, and my baby was initially diagnosed with laryngitis and then pneumonia. After taking medication, the fever subsided for a couple of days, but it recently spiked again to 38.5–41°C (101.3–105.8°F).
We visited the doctor today and did blood and flu tests, which ruled out the flu, adenovirus, and a urinary tract infection (UTI). The doctor mentioned the pneumonia seems to be improving and that this current fever might just be from a common cold. They advised us to manage the fever at home and return in a few days. While fever reducers bring the temperature down temporarily, it spikes right back up to over 39°C once the medication wears off. Should we really wait a few days for our appointment as advised, even with these continuous high fevers? This is our first time dealing with such a prolonged fever, and we are very anxious.
Answer:
It is completely understandable that you are worried and exhausted. Seeing your 20-month-old baby endure recurrent high fevers—especially reaching up to 41°C (105.8°F)—for nearly a week is very distressing for any parent.
To summarize your current situation:
• Your baby has been dealing with fluctuating illness for about a week.
• The progression went from laryngitis to pneumonia, which is now improving.
• Tests for the flu, adenovirus, and urinary tract infections (UTI) came back negative.
• Fever reducers are effective at bringing the temperature down, but the fever returns once the medication wears off.
⚠️ When to go to the Emergency Room immediately:
Please seek emergency medical care right away if your baby shows any of the following signs:
• Difficulty breathing or chest retractions (the skin sinking in around the ribs or neck when breathing).
• No urine output for more than 8 hours.
• Lethargy, extreme drowsiness, or lack of response to you.
• Seizures or abnormal trembling in the arms and legs.
When it is safe to wait for your scheduled appointment:
You can continue to manage the symptoms at home and wait for your next appointment if:
• The fever consistently goes down after giving fever-reducing medication.
• Your baby is able to drink fluids and eat small amounts.
• Your baby shows interest in playing when the fever is reduced.
• Urine output remains normal.
Home Care Guidelines:
Maintain correct medication intervals: Strictly follow the proper dosing schedule for fever reducers (e.g., Acetaminophen/Tylenol every 4 hours, Ibuprofen/Advil every 6 hours).
Hydration: Encourage your baby to drink fluids frequently in small amounts to prevent dehydration.
Environment: Dress your baby in lightweight, breathable clothing and keep the room at a comfortable temperature (around 24–26°C or 75–78°F).
Track the fever: Keep a written log of the time, temperature, and when medications were given to share with your doctor.
During the recovery phase of pneumonia, it is not uncommon for fevers to fluctuate for 1 to 2 weeks as the body heals. However, a temperature of 41°C is exceptionally high. Please observe your child's overall condition very closely. If you remain concerned about the persistent high temperatures or if your baby's general condition declines, do not hesitate to return to your pediatrician or visit an urgent care clinic before your scheduled appointment.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
