# Day 361: Fever and the ER list at one

> The within-24-hours rules and the 104°F line hold past the birthday; what changes at one is the head-injury rule. The fever card, updated, with your own card beside it.

- Series: Your twelfth month, day by day (https://chorevia.com/learn/twelfth-month), day 361 of 365, week 49
- Canonical URL: https://chorevia.com/learn/twelfth-month/day-361
- Last reviewed: 2026-10-21
- Publisher: Chorevia (https://chorevia.com)
- Cite as: Chorevia. "Day 361: Fever and the ER list at one." Last reviewed October 21, 2026. https://chorevia.com/learn/twelfth-month/day-361

This guide is general education that summarizes published research and guidance from groups like the American Academy of Pediatrics, the CDC, and the WHO. It isn’t medical advice, and every child develops on their own timeline. Your pediatrician knows your child; if something feels wrong, call them. In an emergency, call 911.

The fever card from last month is still right, almost. The birthday changes one line on it, the head-injury rule, and the 1-year guide takes over the list the card is copied from. Today is the fever rules that hold, the one that shifts, and ten minutes with a pen.

## Heart

What holds. Use a thermometer; feeling the forehead isn't accurate ([AAP](https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Fever-and-Your-Baby.aspx)). Call within 24 hours for a fever with no other symptoms for more than 2 days, any fever that lasts more than 3 days, or a fever that comes back after a day without one ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)). Call right away for a fever over 104°F (40°C), and the AAP also says you may need to call about a temperature of 103°F (39.4°C) or higher in babies over 6 months ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever); [AAP](https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Fever-and-Your-Baby.aspx)). The 1-year guide keeps the same within-a-day line for a child under 2 ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)).

## Head

Febrile seizures also don't care about the birthday: they affect 3 or 4 of every 100 children between 6 months and 5 years. Lay your child on the floor, turn their head to the side, put nothing in their mouth, and call 911 if it lasts more than 5 minutes ([AAP](https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Febrile-Seizures.aspx)). Even after a short one, get them seen right away ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)). A seizure with a fever, a stiff neck, or a child who is hard to wake or "out of it" is an ER-now line on both guides' lists ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)).

## Body

What shifts. Until the birthday, any head injury in a baby under 1 means a call to your pediatrician, even if they seem fine ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Head+Injury)). From the birthday, the 1-year guide's [safety section](https://chorevia.com/learn/1-year#safety-and-when-to-get-help) carries the list: 911 if, after a head injury, your toddler has a seizure, was knocked out for more than a minute, or is confused or unsteady; the ER now for vomiting 2 or more times or crying nonstop after one; and a call right away for a serious fall or a child who isn't acting normally after it ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Head+Injury); [AAP](https://www.healthychildren.org/English/ages-stages/toddler/Pages/safety-for-your-child-1-to-2-years.aspx)). Four more days of the under-1 rule, then the new back of the card.

## Try today

### The fever card, updated

- **Time:** 10 minutes
- **From the guide:** [Safety and when to get help](https://chorevia.com/learn/1-year#safety-and-when-to-get-help)

1. Copy the front of last month's card as it stands: thermometer, the within-24-hours rules, the over-104°F line, dehydration ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)).
2. Cross out "any head injury under 1" and write the birthday beside it, so the card itself says when the line changes.
3. On the back, the 1-year lines: 911 for a seizure, knocked out more than a minute, confused or unsteady; the ER for vomiting 2 or more times or crying nonstop; a call for a serious fall or not acting normally ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Head+Injury); [AAP](https://www.healthychildren.org/English/ages-stages/toddler/Pages/safety-for-your-child-1-to-2-years.aspx)).
4. Under that, the seizure steps and Poison Help, 1-800-222-1222, which don't change at all ([AAP](https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Febrile-Seizures.aspx); [AAP](https://www.healthychildren.org/English/ages-stages/toddler/Pages/safety-for-your-child-1-to-2-years.aspx)).
5. Photograph both sides for both phones, and read the new back aloud once to whoever else does nights.

**Make it work:** The after-hours number stays at the bottom. The card is for the night you can't think, and the birthday doesn't make those stop.

## Watch for

- **Normal:** a low fever the evening after a long day out, gone by morning. **Call within 24 hours** if it comes back after a day without one ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)).
- **Normal:** a clingy, off-food day with a fever and a baby who still drinks from the held cup. **Call your pediatrician right away** for shaking chills lasting more than 30 minutes ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever)).
- **Normal:** a cold with a cough that keeps everyone up. **Go to the ER now** if your baby has ribs pulling in with each breath, or loud wheezing or harsh noisy breathing ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Breathing+Trouble)).
- **Normal:** a bump on the head from the coffee table and a baby who cries, then cruises on. **Call your pediatrician now**, this week, for any head injury under 1, even if they seem fine ([AAP](https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Head+Injury)).

## For you

Your own urgent signs stay on the fridge, and they don't get a new back on the birthday. The CDC's list runs the full year after birth: a fever of 100.4°F or higher, a headache that won't go away or gets worse, changes in vision, chest pain or a fast-beating heart, trouble breathing, severe belly pain that doesn't go away, thoughts about harming yourself or your baby, and overwhelming tiredness, each of them a reason to seek care, and to tell any provider you were pregnant within the last year ([CDC](https://www.cdc.gov/hearher/maternal-warning-signs/index.html)). A year is almost up. The card comes down when you decide, not when the calendar says so, and its last line, "if you feel like something just isn't right, talk to your health care provider," never expires ([CDC](https://www.cdc.gov/hearher/maternal-warning-signs/index.html)).

If you're the partner: you rewrite the baby's card; she checks it. Then you read hers back to her, out loud, and ask whether any line on it has been true this month.

## Sources

- American Academy of Pediatrics. "Fever and Your Baby." HealthyChildren.org, updated 2025. https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Fever-and-Your-Baby.aspx
- American Academy of Pediatrics. "Fever" (symptom checker). HealthyChildren.org, accessed 2026. https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Fever
- Di Giovine M, Catenaccio E. "Febrile Seizures in Children." HealthyChildren.org, updated 2025. https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/Febrile-Seizures.aspx
- American Academy of Pediatrics. "Head Injury" (symptom checker). HealthyChildren.org, accessed 2026. https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Head+Injury
- American Academy of Pediatrics. "Safety for Your Child: 1 to 2 Years." HealthyChildren.org, updated 2022. https://www.healthychildren.org/English/ages-stages/toddler/Pages/safety-for-your-child-1-to-2-years.aspx
- American Academy of Pediatrics. "Breathing Trouble" (symptom checker). HealthyChildren.org, accessed 2026. https://www.healthychildren.org/English/tips-tools/symptom-checker/Pages/symptomviewer.aspx?symptom=Breathing+Trouble
- Centers for Disease Control and Prevention. "Urgent Maternal Warning Signs and Symptoms." HEAR HER, 2024. https://www.cdc.gov/hearher/maternal-warning-signs/index.html