Fever in Kids: When to Call the Pediatrician

Your child feels warm. You grab the thermometer and see a number that makes your stomach drop. Before you panic, take a breath. Fever is one of the most common reasons parents call the pediatrician, and in most cases, it is your child's immune system doing exactly what it is supposed to do - fighting off infection. That said, there are specific situations where a fever needs medical attention. Here is how to know the difference. ## What Fever Actually Is A fever is a body temperature at or above 100.4 degrees Fahrenheit (38 degrees Celsius), measured rectally in infants or orally or under the arm in older children. It is not an illness - it is a symptom. Most fevers in children are caused by viral infections like colds, flu, or stomach bugs, and they resolve on their own within a few days. The height of the fever does not always tell you how sick your child is. A child with a 103-degree fever who is playing and drinking fluids is often in better shape than a child with a 101-degree fever who is listless and refusing to drink. How your child looks and acts matters more than the number on the thermometer. ## What You Can Do at Home For most fevers, home care is all that is needed: - **Keep them hydrated.** Offer water, diluted juice, popsicles, or an oral rehydration solution. Small, frequent sips work better than trying to get them to drink a full cup at once. - **Dress them lightly.** A single layer of clothing and a light blanket if they are chilly. Bundling a feverish child in heavy layers can actually push the temperature higher. - **Use fever-reducing medication appropriately.** Acetaminophen (for children two months and older) or ibuprofen (for children six months and older) can help with discomfort. Follow the dosing instructions on the package based on your child's weight, not age. Never give aspirin to children. - **Let them rest.** A feverish child does not need to be entertained. If they want to sleep, let them sleep. If they want to lie on the couch and watch something quiet, that is fine too. - **Skip the cold baths.** Lukewarm sponge baths can help if your child is very uncomfortable, but cold water or ice baths can cause shivering, which actually raises body temperature. ## When to Call the Doctor Call your pediatrician or seek medical attention right away if: **For babies under 3 months:** - Any rectal temperature of 100.4 degrees Fahrenheit or higher. In young infants, fever can be a sign of a serious infection. Do not wait - call immediately or go to the emergency room. **For babies 3 to 6 months:** - Temperature of 102 degrees Fahrenheit or higher - Fever with unusual irritability, lethargy, or poor feeding **For children 6 months and older:** - Fever lasting more than three days, even if your child seems otherwise okay - Temperature above 104 degrees Fahrenheit - Fever that goes away for 24 hours and then returns - this can signal a secondary infection - Fever with a stiff neck, severe headache, or sensitivity to light - Fever with a rash, especially one that does not fade when you press on it - Fever with difficulty breathing or rapid breathing - Fever with persistent vomiting or diarrhea leading to signs of dehydration (no tears when crying, no wet diapers for six or more hours, dry mouth) - Fever in a child who has a chronic medical condition or compromised immune system **For any age, call immediately if your child:** - Is inconsolable or unusually difficult to wake - Has a seizure (febrile seizures are usually not dangerous, but always need medical evaluation the first time they occur) - Looks or acts very sick to you, even if you cannot pinpoint why Trust your instincts. You know your child better than anyone. If something feels off, calling the pediatrician is never wrong - that is what they are there for. If you are unsure about what your doctor checks during routine visits, our guide on [well-child visits](/blog/well-child-visits-what-happens-why-it-matters) breaks it down. ## Fever Myths Worth Dropping **Myth: A high fever causes brain damage.** Fevers caused by infection virtually never reach the temperature needed to cause harm (above 107.6 degrees Fahrenheit). The brain has built-in thermostat controls that prevent infection-related fevers from climbing that high. **Myth: You must treat every fever with medication.** If your child has a low-grade fever but is comfortable, eating, and playing, medication is not necessary. The purpose of fever reducers is comfort, not to eliminate the fever itself. **Myth: Teething causes high fevers.** Teething may cause a very slight temperature elevation, but a true fever (100.4 or higher) is not caused by teething. If your teething baby has a real fever, look for another cause. Fever is unsettling, but it is also one of the body's best tools. Keep your child comfortable, watch for the warning signs above, and do not hesitate to call your pediatrician when something does not feel right. You have got this.