Q: My child had a fever, was fine, and now the fever is back. Is this a new illness or getting worse?

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 fever until early yesterday morning, was completely fine for a while, but now the fever has returned. Is this a new infection, or is the original illness getting worse? The symptoms started on Monday with a swollen throat and a runny nose, but starting today, my child has developed a cough and the fever is back.

Answer:

It is completely understandable to be worried since your child's symptoms have been ongoing since Monday.

Current Situation

Viral infections typically progress and change symptoms over a span of 3 to 7 days. Starting with a swollen throat and a runny nose, then developing a cough and having the fever return a few days later, is most likely the same cold progressing rather than a new infection.

Home Care Management

• Offer fluids frequently in small amounts to stay hydrated.

• Dress your child in light clothing and maintain a comfortable room temperature.

• Give fever-reducing medication (antipyretics) only if your child is visibly uncomfortable from the fever.

• If your child is 1 year of age or older, you can give 1 teaspoon of honey to help soothe the cough.

• For a stuffy nose, use normal saline drops followed by gentle nasal suction.

When to See a Doctor Immediately

Please seek in-person medical evaluation today if your child shows any of the following signs:

• Difficulty breathing (e.g., chest pulling in below the ribs, wheezing, or nasal flaring).

• Signs of dehydration (e.g., drinking very little or no urine output for more than 8 hours).

• Extreme lethargy, limpness, or difficulty waking up.

• The fever continues for more than 3 days, or new severe symptoms appear (such as ear pain or worsening throat pain).

General Course of the Illness

Generally, the fever from a typical cold can last 2 to 3 days, while a cough may linger for 1 to 2 weeks. If your child's overall condition seems to be gradually improving, it is generally safe to continue observing and managing the symptoms at home. However, consult your pediatrician for an accurate assessment if the symptoms persist, worsen, or if you are ever uncertain about your child's condition.

For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.

https://fevercoach.us