Most fevers don’t need aggressive treatment. A fever is your body’s natural defense against infection, and the best way to help is usually to stay comfortable, drink plenty of fluids, and let it run its course. A temperature of 100.4°F (38°C) or higher counts as a fever, and while it can feel miserable, it typically resolves on its own within a few days.
That said, there are specific steps you can take to bring relief, clear guidelines on when medication makes sense, and important warning signs worth knowing, especially for young children.
Why Your Body Creates a Fever
When your immune system detects an infection, it releases chemical signals that act on the temperature-control center in your brain. These signals trigger the release of a compound called prostaglandin E2, which essentially raises your body’s internal thermostat. Your normal set point of roughly 98.6°F shifts upward, and your body responds by generating heat: shivering, constricting blood vessels near the skin, and making you want to curl up under a blanket.
This elevated temperature actually helps you fight infection. Many bacteria and viruses reproduce less efficiently at higher temperatures, and certain immune cells work better when the body is warmer. So while a fever feels awful, it’s doing something useful. The goal of fever management isn’t to eliminate the fever entirely. It’s to keep you or your child comfortable enough to rest, eat, and drink.
Simple Ways to Stay Comfortable
Fluids are the single most important thing during a fever. You lose water faster when your temperature is elevated, through sweat and faster breathing. Water, broth, diluted juice, and oral rehydration solutions all work. For breastfed infants, nurse more frequently than usual.
Dress in light, breathable clothing or comfortable pajamas. Avoid bundling up in heavy blankets, which can trap heat and push your temperature higher. If you’re having chills, a single light layer or sheet is enough. Once the chills pass and you start feeling warm, remove the extra layer.
Rest matters. Your body is directing energy toward fighting infection, and physical activity generates additional heat. Stay home, sleep when you can, and let your body do its work.
Skip the Cold Bath
Lukewarm sponge baths are a common home remedy, but research doesn’t support them. In a study of febrile children, those who received a tepid sponge bath along with a fever reducer cooled slightly faster during the first hour compared to children who took medication alone. But by the two-hour mark, there was no meaningful temperature difference between the groups. The sponge-bathed children did, however, score significantly higher on discomfort. In short, sponge baths make kids more miserable without providing a lasting benefit.
Ice baths and cold water are even worse. They can cause shivering, which actually raises your core temperature, and in young children they can cause a dangerous drop in body temperature. If you want to use water, a lukewarm washcloth on the forehead is fine for comfort, but don’t expect it to lower the fever.
When to Use Fever-Reducing Medication
Fever reducers exist to improve comfort, not to cure the underlying illness. If you or your child feel reasonably okay despite the elevated temperature, medication isn’t necessary. But if the fever is causing significant discomfort, body aches, or difficulty sleeping, it’s reasonable to take something.
The two main options are acetaminophen and ibuprofen. Acetaminophen can be given every 4 to 6 hours, up to 5 times in 24 hours. Ibuprofen can be given every 6 to 8 hours, up to 4 times in 24 hours. Both should be dosed by weight, not age, especially for children. Check the concentration on the package carefully, as children’s formulations come in different strengths.
A few important restrictions to keep in mind:
- Infants under 8 weeks should not receive acetaminophen without direction from a pediatrician.
- Infants under 6 months should not receive ibuprofen.
- Children with chickenpox (or exposure to chickenpox in the past 21 days) should avoid ibuprofen.
- Anyone who is dehydrated or vomiting should avoid ibuprofen, which can irritate the stomach and worsen kidney stress when fluid levels are low.
Don’t Alternate Between Medications
You may have heard advice about alternating acetaminophen and ibuprofen every few hours. The American Academy of Family Physicians cautions against this. There’s no evidence that alternating brings a fever down faster or more effectively than using a single medication alone. More importantly, the switching schedule is genuinely confusing. When you’re alternating between one drug given every 4 to 6 hours and another given every 6 to 8 hours, it becomes easy to lose track and accidentally give a double dose. Stick with one medication at a time.
Fever in Babies and Young Children
Fever management in infants follows stricter rules than in older children or adults, because young babies can deteriorate quickly and their immune systems are still developing.
Any infant under 3 months old with a temperature of 100.4°F or higher needs immediate medical attention. This is not a “wait and see” situation. The American Academy of Pediatrics guidelines specifically address infants 8 to 60 days old with fevers at or above this threshold, and evaluation typically involves blood work and sometimes other tests to rule out serious bacterial infections.
For babies 3 to 6 months old, a fever of 102°F (38.9°C) or higher warrants a call to your pediatrician. For children over 6 months, the threshold rises to 103°F (39.4°C), though you should still call sooner if your child seems unusually lethargic, refuses to drink, or is difficult to wake.
Febrile Seizures
Children between 6 months and 5 years old can sometimes have seizures triggered by a rapid rise in body temperature. These are most common between ages 1 and 3. During a febrile seizure, a child may lose consciousness, shake or stiffen in the arms and legs, roll their eyes back, or lose bladder control.
Febrile seizures look terrifying but are usually not dangerous. If one happens, place the child on their side on a flat surface, don’t put anything in their mouth, and note the time. If the seizure lasts longer than 5 minutes, call an ambulance. If it’s your child’s first febrile seizure, seek medical attention regardless of duration so the cause of the fever can be evaluated.
Warning Signs That Need Medical Attention
For adults, a fever on its own is rarely an emergency. But certain symptoms alongside a fever point to something more serious. Seek help promptly if you have a fever combined with any of the following: a stiff neck, confusion or disorientation, trouble breathing, seizure, loss of consciousness, severe pain anywhere in the body, or swelling or inflammation that’s getting worse. Pain during urination or foul-smelling urine alongside a fever suggests a urinary tract infection that may need treatment. For women, discolored or foul-smelling vaginal discharge with a fever could indicate a pelvic infection.
For children, the behavioral signs often matter more than the number on the thermometer. A child with a 103°F fever who is still playing, drinking fluids, and making eye contact is generally less concerning than a child with a 101°F fever who is limp, unresponsive, and refusing all fluids. Pay attention to how your child looks and acts, not just the temperature reading.