Q: Can a fever suddenly start while recovering from RSV and Rhinovirus?
- Myeongchan Kim, MD
- 1 hour ago
- 2 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 5-year-old child took medication for over a month due to severe phlegm, but never had a fever during that time. Because the cough and phlegm wouldn't go away despite the medication, we did a viral panel, and it came back positive for RSV and Rhinovirus. The doctor said the lungs and bronchial tubes were fine. My child was hospitalized for about 3 days, and after being discharged, has been taking medication for 5 days. The cough and phlegm are almost entirely gone now. However, a fever suddenly started tonight. Is it possible to develop a fever just as RSV is almost completely healed? I am so worried because my child has been sick for nearly two months.
Answer:
Taking care of a sick child for over a month is exhausting, and it is completely understandable that you are worried about this new symptom.
Typically, RSV and Rhinovirus cause a fever in the early stages of the illness, which is then followed by a prolonged period of coughing and phlegm. If a new fever develops during the recovery phase, it usually points to a secondary bacterial infection (such as an ear infection, sinusitis, or pneumonia) or a new, overlapping viral infection, rather than the original RSV infection flaring up.
What you can do at home right now:
• Record your child's temperature every 4 hours.
• Monitor their urine output, fluid intake, and overall energy levels.
• Dress your child in light clothing, keep the room at a comfortable temperature, and offer small, frequent sips of water.
• Administer fever-reducing medication only if your child is uncomfortable.
When to seek immediate medical attention:
Please take your child in for a same-day medical evaluation if you notice any of the following signs:
• A fever of 38.5°C (101.3°F) or higher that persists, or any fever lasting more than 3 days.
• Rapid breathing, wheezing, or grunting sounds.
• Ear pain, an increase in thick yellow nasal discharge, or a worsening cough.
• No urine output for more than 8 hours, extreme lethargy, or refusal to drink fluids.
Because a new fever has appeared after the initial symptoms have mostly resolved, it is highly recommended to contact your pediatrician or the hospital where your child was treated. Let them know that a new fever has started 5 days post-discharge. A doctor will need to examine your child in person to determine if there is a secondary infection and provide the appropriate treatment plan.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
