A fever is your immune system’s deliberate response to infection, and in most cases, it will resolve on its own without medication. The key to managing it comfortably at home comes down to staying hydrated, resting, and helping your body regulate its own temperature. A reading of 100.4°F (38°C) or higher counts as a fever, and most low-grade fevers in otherwise healthy adults and older children can be safely managed with supportive care.
Why Your Body Runs a Fever
Before trying to bring a fever down, it helps to understand what it’s doing. Fever isn’t a malfunction. Elevated body temperature enhances nearly every arm of your immune response: white blood cells move faster, consume pathogens more aggressively, and produce more of the reactive molecules that destroy invaders. Fever also increases the body’s production of interferons, proteins with direct antiviral activity.
At the same time, the heat makes life harder for the pathogens themselves. Bacteria and viruses that are actively replicating are more vulnerable to heat stress than your own resting cells. Researchers have described this as a built-in advantage: rapidly dividing invaders are inherently more sensitive to disruption from any stressor, including the temperature spike your body creates. So a mild to moderate fever is genuinely useful, and aggressively suppressing it isn’t always the best move. The goal with non-medicine approaches is comfort, not necessarily eliminating the fever entirely.
Stay Hydrated, Especially With Warm Fluids
Fluid intake is the single most important thing you can do during a fever. Your body loses water faster than normal through sweating, which is one of its primary cooling mechanisms. Every gram of sweat that evaporates from your skin removes about 0.58 kilocalories of heat. That process works only if you have enough fluid to spare. When you become dehydrated, sweating slows, blood volume drops, and you start feeling dizzy, crampy, and faint.
Water is the obvious choice, but broth-based soups and diluted fruit juices also work well because they provide some calories and electrolytes. Chicken soup has no magic ingredient, but it delivers fluids, salt, and energy in an easy-to-digest form. Avoid coffee and alcohol. Caffeine increases dehydration, and alcohol suppresses your immune response while also pulling water from your system. If you’re sweating heavily, an oral rehydration drink or a sports drink diluted with water can help replace lost sodium and potassium.
For children, offer small, frequent sips rather than large amounts at once. Popsicles, ice chips, and chilled fruit can help if a child resists drinking.
Rest More Than You Think You Need To
Fever is metabolically expensive. Your body burns roughly 13% more energy for every 1°C (about 1.8°F) your temperature rises above normal. That extra energy has to come from somewhere, and physical activity competes directly with the immune response for those calories.
Sleep plays a specific role here. During infection, your body shifts its sleep architecture to support fever production. It increases the type of deep sleep that conserves energy while reducing the lighter sleep stages that would normally allow heat to dissipate. This isn’t a side effect of being sick. It’s a coordinated strategy. Your immune signaling molecules actively promote deeper sleep to fuel the fever response. Working through a fever or pushing yourself to stay active undermines this process. Lying down, staying quiet, and sleeping as much as your body asks for is one of the most effective things you can do.
Keep Your Environment Cool and Comfortable
Your instinct when you have chills may be to pile on blankets, but this traps heat against your body and can push your temperature higher. Wear light, breathable clothing, ideally a single layer of cotton or moisture-wicking fabric. Keep your room at a comfortable temperature. You don’t need to make it cold, just avoid making it warm.
If you’re shivering, a light blanket is fine until the chills pass. Shivering is your body’s way of generating heat to reach its new temperature set point, and fighting it with heavy covers only adds to the problem once the shivering stops and the fever plateaus.
What About Cold or Lukewarm Baths?
Tepid sponge baths are one of the most commonly recommended home remedies for fever, but the evidence behind them is surprisingly weak. Multiple systematic reviews have found that sponging is less effective than standard fever-reducing medication, and the most recent Cochrane Review on the topic confirmed this. The UK’s National Institute for Health and Care Excellence now specifically recommends against tepid sponging for children with fever.
Cold baths or ice packs are even more problematic. Cold water against the skin triggers shivering, which actually generates more internal heat and works against what you’re trying to accomplish. It’s also uncomfortable enough that children may become distressed, which raises heart rate and metabolic demand. If you want to use water for comfort, a lukewarm washcloth on the forehead or the back of the neck is unlikely to cause harm, but don’t expect it to meaningfully lower a temperature. Think of it as a comfort measure, not a treatment.
Eat When You Can
The old advice to “starve a fever” is wrong. Because fever increases your metabolic rate, your body needs more calories during a fever, not fewer. You don’t need to force large meals, but eating small amounts of easily digestible food helps maintain the energy supply your immune system is drawing on. Toast, crackers, rice, bananas, eggs, and soup are all reasonable choices. If your appetite is completely gone, prioritize fluids with some caloric content, like juice or broth, over plain water.
Special Considerations for Children
Children spike fevers more readily than adults, and parents often feel pressure to bring the number down. But fever-reducing measures in children follow the same principle as in adults: comfort matters more than the number on the thermometer. Physical cooling methods like fans and sponge baths are generally discouraged for children because they’re unpleasant and not particularly effective.
About 3% to 5% of genetically susceptible children will experience a febrile seizure, a brief convulsion triggered by a rapid rise in temperature. These look alarming but do not cause brain damage. Notably, fever-reducing treatments, even when given preventively, do not prevent febrile seizures from occurring.
Certain situations in children do require medical attention rather than home management:
- Under 3 months old with any fever of 100.4°F (38°C) or higher. This always warrants a call to a provider.
- 3 to 6 months old with a temperature above 102°F (38.9°C), or a lower fever with unusual irritability or sluggishness.
- Any age with a fever lasting more than three days, repeated vomiting, confusion, poor eye contact, severe headache, or a seizure lasting more than five minutes.
When a Fever Needs More Than Home Care
Most fevers in healthy adults resolve within a few days. But adults with temperatures of 103°F (39.4°C) or higher typically look and feel quite ill, and that’s a reasonable threshold to consider medical evaluation rather than continuing to manage things at home. A fever following heat exposure, such as being left in a hot car, is a medical emergency regardless of the reading. The same applies to any fever accompanied by a stiff neck, confusion, difficulty breathing, persistent vomiting, or a rash that doesn’t fade when you press on it.
People with heart disease, lung conditions, or compromised immune systems should have a lower threshold for seeking help, because the increased metabolic demand of fever can worsen those underlying conditions.