Most adult fevers break on their own within a few days, and you can manage them effectively at home with a combination of over-the-counter medication, fluids, and simple cooling strategies. A normal body temperature hovers around 98.6°F (37°C), with a low-grade fever ranging from 99.1 to 100.4°F (37.3 to 38.0°C) and a high-grade fever reaching 102.4°F (39.1°C) or above.
Why Your Body Runs a Fever
Before trying to bring your temperature down, it helps to understand what a fever actually does. Your body raises its internal temperature on purpose. The heat makes it harder for viruses and bacteria to survive, essentially cooking them out. At the same time, your white blood cells become more active and respond faster to infection in warmer conditions. Your blood vessels constrict to help hold in that heat.
Because fever is part of your immune defense, you don’t always need to suppress it. A mild fever that isn’t making you miserable can be left alone. But if you’re achy, exhausted, or unable to sleep, treating it is perfectly reasonable and won’t meaningfully slow your recovery.
Over-the-Counter Fever Reducers
Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are the two main options. Both lower fever and relieve the body aches that come with it, but they work through different pathways and are processed by different organs. Adults can take 650 to 1,000 milligrams of acetaminophen every four to six hours, up to a maximum of 4,000 milligrams in 24 hours. For extra-strength formulations, the ceiling is lower: 3,000 milligrams per day. Ibuprofen is typically dosed at 400 milligrams every four to six hours, with a daily limit of 1,200 milligrams for over-the-counter use.
You can also alternate between the two for more consistent relief. Take one first, then switch to the other four to six hours later, continuing to alternate every three to four hours throughout the day. This approach provides better symptom control than either medication alone. The key is not to take both at the same time. If you have kidney, liver, digestive, or bleeding problems, be cautious with either medication. And if you find yourself alternating them for more than three consecutive days, it’s worth checking in with a healthcare provider.
Stay Hydrated
Fever increases fluid loss through sweating and faster breathing, making dehydration a real risk. Water is the simplest fix, but juice and broth also work well. If you’ve been sweating heavily or struggling to eat, an oral rehydration solution (like Pedialyte or a similar electrolyte drink) replaces both water and the salts your body loses. Popsicle versions of these solutions can be easier to tolerate if nausea is an issue.
There’s no magic number of ounces to hit, but a good rule of thumb is to drink enough that your urine stays pale yellow. If it’s dark or you’re urinating much less than usual, you need more fluid.
Cool Down Without Overcooling
Dress in light, breathable clothing and keep your room at a comfortable temperature. The instinct to pile on blankets when you have chills is understandable, but extra layers trap heat and can push your temperature higher. One light blanket is fine if you’re shivering, but shed the extras once the chills pass.
A lukewarm sponge bath or compress can help bring your temperature down after you’ve taken a fever reducer. The recommended water temperature is between 90°F and 95°F (32 to 35°C), which feels slightly cool but not cold. Avoid ice baths or very cold water. These cause your blood vessels to constrict rapidly, which actually traps heat inside your body and can trigger intense shivering that raises your core temperature further. The goal is gentle, gradual cooling.
Rest Matters More Than You Think
Your immune system burns through energy when fighting an infection. Sleep and rest give your body the resources it needs to do that work efficiently. If a fever is keeping you from sleeping, treating it with medication at bedtime is one of the most useful things you can do. Even during the day, lying down and minimizing activity helps your body direct energy toward recovery rather than movement.
Eating can feel unappealing when you’re feverish, but try to get something in. Soups, crackers, toast, or fruit are all easy options. Your body needs calories to fuel the immune response, and going without food for days will leave you feeling weaker even after the fever breaks.
Special Considerations for Older Adults
If you’re over 65 or caring for someone who is, fever can be trickier to spot. Older adults often run lower baseline temperatures, so their fevers may also register lower than expected. A single reading above 100°F, multiple readings above 99°F, or a rise of more than 2°F above a person’s normal temperature all count as potential signs of infection in this age group.
The immune system weakens with age, and older adults are more likely to have conditions like diabetes that raise the risk of complications from infections like the flu or COVID-19. A fever that might be manageable at home for a 35-year-old may warrant a phone call to a doctor for someone in their 70s, especially if it comes with confusion, difficulty breathing, or unusual fatigue.
Signs a Fever Needs Medical Attention
Most fevers in healthy adults resolve within three days. Seek medical care if your temperature reaches 103°F (39.4°C) or higher and doesn’t respond to medication, or if it persists beyond three days regardless of how high it is. A fever paired with a stiff neck, severe headache, confusion, difficulty breathing, persistent vomiting, or a rash needs prompt evaluation. These combinations can signal infections that require more than home care.