Q: My 11-month-old has a persistent fever, cold symptoms, and diarrhea. Should I wait for our Wednesday appointment or go to the doctor tomorrow?
Updated: Sep 7
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 11-month-old baby has had a fever since Sunday. During the day, the temperature doesn't drop below 38°C, and in the evening, it stays around 37.7-37.8°C, with a peak of 38.7°C.
Today, the fever was 38.1°C at 7:30 AM. The baby fell asleep around 9:30 AM and woke up at 1:00 PM with the fever back up to 38.6°C. Even two hours after giving a fever reducer, the temperature showed no signs of dropping, so I alternated with a different medication (cross-dosing).
Today, new symptoms appeared: sneezing, a thick runny nose, and coughing. The baby also had diarrhea twice in a row (watery stool that soaked into the diaper). The fever eventually dropped to 37.9°C, and the baby took a nap. When awake, the baby plays well but repeatedly lies down on the floor, plays a bit, and lies down again, showing less energy than usual.
My older child has had a phlegmy cough for 3 weeks (a viral test came back negative) and has a doctor's appointment next Wednesday. Can I wait and take the baby to the doctor then, or should I take them tomorrow?
Answer:
It is completely understandable that you are worried, as the fever has been ongoing since Sunday, and new symptoms like a runny nose, cough, and diarrhea have developed today.
Current Condition Summary:
11-month-old infant, fever on its 4th day (Sunday to Thursday).
Highest temperature: 38.7°C, dropping very slowly even after medication.
New symptoms today: thick runny nose, cough, and 2 episodes of watery diarrhea.
Energy levels are slightly reduced (alternating between playing and lying down), but the baby is not completely lethargic.
Older sibling has had a persistent cough for 3 weeks.
Warning Signs for an Immediate Doctor's Visit (Go tomorrow or sooner if any of these occur):
Breathing difficulties, such as lips turning blue or the chest retracting under the ribs while breathing.
Signs of severe dehydration: No urination for 8 hours or more, no tears when crying, dry mouth, or if the baby is completely limp and cannot make eye contact.
Blood mixed in the stool, or having 6 or more episodes of watery diarrhea in a day.
The fever continues into the 5th day (Friday) or spikes higher than before.
If none of these warning signs are present, and the baby is taking small sips of water, breast milk, or formula, and remains responsive while awake, you can continue to observe them at home until the Wednesday appointment.
Home Care Guidelines:
Frequent Hydration: Offer one or two sips of breast milk, formula, or water every 5 to 10 minutes to prevent dehydration.
Fever Reducer Rule: It is recommended to stick to one type of fever reducer rather than cross-dosing, as alternating medications can cause confusion with dosing. Administer it every 4 to 6 hours, and only if the baby is visibly uncomfortable from the fever.
Nasal Care: Put 1-2 drops of normal saline into the nose and gently use a nasal aspirator to clear it out, especially before feeding or sleeping.
Diarrhea Care: Change diapers frequently. Instead of using wet wipes, wash the baby's bottom with warm water and apply a barrier cream to prevent skin irritation.
Environment: Dress the baby in lightweight clothing and maintain a comfortable indoor room temperature of 22-24°C.
Next Steps:
When you go to the older child's appointment on Wednesday, take the baby with you. Inform the pediatrician about the "4 days of fever followed by new respiratory and diarrhea symptoms" so both children can be evaluated at the same time. However, if you observe any of the red-flag warning signs mentioned above at any point, please contact your pediatrician or visit an urgent care center immediately for an in-person evaluation.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
