Q: My child has a low-grade fever of 37.3°C to 37.5°C while recovering from bronchiolitis. Is this normal?
Updated: 1 day ago
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 was diagnosed with bronchiolitis last Friday and has been taking their prescribed medication. Their runny nose, cough, and breathing sounds have noticeably improved. However, after having no fever at all initially, their body temperature is now hovering between 37.3°C and 37.5°C (99.1°F–99.5°F). Are they still recovering, or does this mean the illness is lingering or getting worse?
Answer:
It is understandable to feel concerned when a mild temperature appears after your child seemed to be over the worst of it. The good news is that the improvement in their primary respiratory symptoms—such as their breathing sounds, cough, and runny nose—is a very positive sign that their airways are healing.
A temperature between 37.3°C and 37.5°C is considered borderline to a very mild low-grade fever. Here is what this pattern generally means during bronchiolitis recovery:
Active Healing: Bronchiolitis typically lasts around 7 to 10 days, but full airway recovery can take 2 to 3 weeks. A slight temperature fluctuation can happen as the immune system continues to clear the viral infection.
Secondary Infection Watch: While usually benign, a newly emerging fever later in the course of an illness can sometimes indicate a secondary bacterial infection (such as an ear infection), which is why ongoing observation is important.
What you can do right now:
Continue Prescribed Treatments: Finish medications as directed by your doctor.
Focus on Hydration: Keep offering frequent fluids (breast milk, formula, or water depending on age) to thin mucus and prevent dehydration.
Monitor Temperature and Activity: Check their temperature 2 to 3 times a day, and pay close attention to how they are acting, eating, and sleeping rather than focusing solely on the thermometer.
When to seek immediate medical evaluation:
Please consult your pediatrician or visit a clinic if you notice any of the following warning signs:
The fever rises to 38.5°C (101.3°F) or higher.
The low-grade fever persists for more than 3 consecutive days.
Signs of increased breathing effort return (such as flaring nostrils, rapid breathing, or the skin pulling in between the ribs or below the neck).
Your child becomes unusually irritable, lethargic, or difficult to wake.
There is a significant drop in fluid intake or fewer wet diapers.
For now, your child appears to be in the recovery phase. Continue supportive care at home and monitor their temperature closely over the next 2 to 3 days, seeking in-person medical care promptly if their fever spikes or their breathing worsens.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
