Q: My child has a mild fever (37.5°C) while taking Doxycycline for Mycoplasma. Should we be re-hospitalized or observe over the weekend?
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 hospitalized for Mycoplasma pneumonia. We switched to Doxycycline on Thursday. With the hospital medication (including acetaminophen) taken every 6 hours, my child's temperature was normal, except for one spike to 38°C at dawn requiring a fever reducer. On Friday, after taking the morning dose, we went to a larger hospital for tests. My child had to fast, missed the lunch dose, and took the evening dose 12 hours later, but maintained a normal temperature.
Originally, we planned to return and be re-admitted to the local children's hospital where we had stayed for a few days, because although my child is clearly improving on Doxycycline, the X-ray still looks bad (the local hospital recommended admission). However, the doctor at the larger hospital advised that for Mycoplasma, oral medications are more important than IV medications. Since it's a very common illness right now, outpatient treatment is appropriate. We were told to continue the Doxycycline and return next week for a follow-up X-ray.
This morning, my child's temperature is around 37.5°C. Can a mild fever last for a few days even after starting Doxycycline? Should we go back for admission, or is it safe to observe at home? My child's general condition is good, but as a parent, I am exhausted. Can we safely monitor my child over the weekend?
Answer:
You have done a great job caring for your child during their hospital stay and monitoring their condition so closely.
Current Situation Summary:
Your child is generally improving after starting Doxycycline, and their overall condition is good.
A temperature of 37.5°C is considered a mild fever. If your child is active, staying hydrated, and urinating normally without the need for fever reducers, it is safe to observe them at home over the weekend.
It is very common for X-ray findings to lag behind clinical symptoms; the imaging often takes longer to clear up than the child's actual symptoms.
What to Do at Home Over the Weekend:
Take the Doxycycline strictly on time (with meals and plenty of water).
Maintain good fluid intake (check the color and frequency of urine to ensure proper hydration).
Keep a temperature log (note if a fever of 38.0°C or higher persists without fever reducers).
Monitor breathing: watch for shortness of breath, chest retractions (skin pulling in under the ribs), or wheezing.
When to Return to the Hospital (Red Flags):
Seek immediate medical evaluation (at the previous hospital or an emergency room) if any of the following occur:
A fever of 38.5°C or higher persists without fever reducers, or the temperature is trending upward.
Breathing becomes fast, labored, or there are changes in lip color.
The child refuses all fluids/food and has not urinated for over 8 hours.
The child suddenly becomes lethargic or difficult to wake up.
Hospital Admission vs. Outpatient Treatment:
As advised by the doctor at the larger hospital, oral antibiotics (like Doxycycline) are the key treatment for Mycoplasma pneumonia.
If your child is in good spirits, eating, drinking, and breathing comfortably, outpatient treatment is perfectly fine.
X-ray improvements often appear 1 to 2 weeks after the physical symptoms resolve.
Hospitalization is typically only necessary if the child requires supplemental oxygen, IV fluids, or cannot tolerate oral medications.
If your child remains stable without any of the red flag symptoms over the weekend, you can safely monitor them at home and follow up with your scheduled outpatient appointment next week to recheck the X-ray. However, if the fever spikes again or if you notice any concerning changes in their breathing, please seek an in-person medical evaluation promptly.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
