A fever is your body’s natural response to infection, and most fevers resolve on their own with simple measures at home. The key strategies are staying hydrated, using over-the-counter medications when needed, keeping your environment comfortable, and knowing when a fever signals something more serious. A temperature of 100.4°F (38°C) or higher, measured orally or rectally, is generally considered a fever.
Stay Hydrated
Fever makes you sweat, and that fluid loss can compound how terrible you feel. When the total amount of water in your body drops below normal, your body actually struggles to regulate heat properly, which can make the fever worse. Replenishing fluids is one of the simplest and most effective things you can do.
Aim for 8 to 10 cups of water per day as a baseline, and more when you’re feverish. If drinking large amounts feels difficult, take small, frequent sips instead. Water is ideal, but if you’ve lost your appetite and aren’t eating much, drinks with some sugar or electrolytes can help maintain your energy. Sucking on ice cubes or electrolyte ice blocks is another option if even sipping feels like too much.
Over-the-Counter Fever Reducers
Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are the two standard options for bringing a fever down. Both work well, and which you choose comes down to personal preference and any health conditions you have. Ibuprofen also reduces inflammation, which can help if your fever comes with body aches.
For adults using acetaminophen, the critical safety limit is no more than 4,000 milligrams in a 24-hour period. Going over that threshold risks serious liver damage, and it’s easier to hit than you’d think if you’re also taking combination cold or flu medications that contain acetaminophen. Always check the label of every product you’re taking.
You may have heard advice about alternating between acetaminophen and ibuprofen every few hours. The American Academy of Family Physicians cautions against this approach. There’s no evidence that alternating is safer or more effective than using one medication consistently, and the complicated timing schedule increases the risk of accidentally overdosing on one of them. Pick one and stick with it.
Fever Medication for Children
Children’s doses should always be based on weight, not age. If you don’t know your child’s weight, age can serve as a rough guide, but weight is more accurate. Liquid children’s acetaminophen is standardized at 160 milligrams per 5 milliliters. For children under 12, doses can be given every 4 hours, with no more than 5 doses in 24 hours. Acetaminophen should not be given to children under 2 without a doctor’s guidance.
Avoid giving children under 6 combination products that contain more than one active ingredient. And extra-strength acetaminophen (500 mg) is not appropriate for children under 12.
Keep Your Environment Cool and Comfortable
Your instinct when feverish might be to pile on blankets, but bundling up traps heat and can push your temperature higher. Wear lightweight clothing and use a light sheet or blanket. Keep the room at a comfortable, slightly cool temperature.
A lukewarm sponge bath can help bring a fever down externally. Use water between 90°F and 95°F (32°C to 35°C), and sponge for 20 to 30 minutes. If you or your child starts shivering, stop immediately. Shivering is your body’s way of generating more heat, which defeats the purpose entirely.
Never use cold water, ice baths, or rubbing alcohol to cool someone with a fever. A sudden drop in skin temperature triggers the body to fight back by raising its internal temperature, making things worse. Lukewarm water works because it draws heat away gradually without setting off that rebound response.
Rest and Let the Fever Work
Fever itself isn’t the enemy. It’s a defense mechanism: your body raises its temperature to create a less hospitable environment for viruses and bacteria. A mild fever in the 100°F to 102°F range doesn’t necessarily need to be treated with medication if you’re otherwise comfortable. The goal of treatment is to help you feel better, not to force your temperature back to exactly 98.6°F.
Sleep is when your immune system does its heaviest lifting. If you can rest, do it. Cancel plans, skip the workout, and let your body focus its energy on recovery.
Warning Signs That Need Medical Attention
Most fevers in otherwise healthy adults and children are harmless and resolve within a few days. But certain symptoms alongside a fever point to something that needs prompt evaluation:
- Stiff neck with pain when bending your head forward, especially combined with sensitivity to bright light, which can indicate meningitis
- Mental confusion, altered speech, or strange behavior
- Severe headache that doesn’t respond to medication
- Rash that appears alongside the fever
- Persistent vomiting
- Difficulty breathing or chest pain
- Pain when urinating
- Seizures or convulsions
For children specifically, watch for listlessness, poor eye contact, repeated vomiting, or a fever lasting longer than three days. If a child has a seizure associated with a fever that lasts more than five minutes, call 911. And any fever in a child that developed after being left in a hot car requires immediate emergency care, regardless of the temperature reading.