Most fevers with chills can be managed at home with over-the-counter medication, steady fluid intake, and rest. The chills typically ease once a fever reducer brings your temperature back down, and the whole cycle usually resolves within five to seven days for common viral infections like the flu. Here’s how to move through it as comfortably as possible.
Why Fever and Chills Happen Together
When your immune system detects an infection, it signals your brain’s temperature control center to raise its target temperature. Your brain essentially decides that 98.6°F isn’t warm enough anymore and resets the thermostat higher. The problem is that your body is still at its normal temperature, so your brain interprets that gap as “too cold” and triggers shivering to generate heat. That’s why you feel freezing even though you’re actually warming up.
Once your body reaches the new, higher set point, the chills stop and you feel hot instead. This is the peak of the fever. When the immune response winds down or you take a fever reducer, the set point drops back to normal, and your body switches to sweating to cool off. Understanding this cycle helps explain why chills come and go, and why treating the fever directly is the fastest way to stop them.
Fever Reducers: What to Take and When
Acetaminophen and ibuprofen are the two main options for bringing down a fever. Both work well, and the choice mostly comes down to what you tolerate and what else you might be taking. The maximum safe dose of acetaminophen for adults is 4,000 milligrams in 24 hours, but staying under 3,000 mg is a safer target if you’re taking it for more than a couple of days, since acetaminophen is tough on the liver at high doses. Ibuprofen is generally taken every six to eight hours and should be taken with food to protect your stomach.
You don’t necessarily need to treat every fever. A mild fever (under about 102°F) is your immune system doing its job, and letting it run can sometimes help you recover faster. But if the fever is making you miserable, causing intense chills, or climbing above 102°F, there’s no reason to tough it out. Take the medication to bring it down, rest, and let your body heal.
One important note: don’t give aspirin to children or teenagers with a fever, as it’s linked to a rare but serious condition called Reye’s syndrome.
Stay Ahead of Dehydration
Fever increases your body’s demand for fluids significantly. You lose water through sweating, faster breathing, and the metabolic work of running a higher temperature. Baseline recommendations are about 15 cups of fluid a day for men and 11 for women under normal conditions, so you’ll need more than that when you’re feverish.
Water is the obvious choice, but when you’re sick, drinks with some sugar and electrolytes can be easier to tolerate and provide a few calories at the same time. Good options include diluted juice, broth, sports drinks, and hot tea with honey. If nausea is an issue, take small sips of about an ounce every three to five minutes rather than trying to drink a full glass at once.
Watch for signs that you’re falling behind: dark urine, dizziness, headache, extreme thirst, or a noticeably fast heart rate. These all point to dehydration. If you notice significant confusion, fainting, or you can’t keep any fluids down, that warrants emergency care.
What to Wear and How to Set Up Your Room
This is where most people make mistakes. When chills hit, the instinct is to pile on blankets and heavy clothes. When the fever peaks and you’re sweating, you want to strip everything off and blast the air conditioning. Both extremes work against you.
Dress in light, breathable clothing and keep your room at a comfortable temperature. A single sheet or light blanket is enough. Overdressing traps heat and can push your fever higher. Underdressing or exposing yourself to cold air triggers more shivering, which raises your temperature further and makes the chills worse. The goal is to let your body regulate itself without interference.
Lukewarm Sponging (Not Cold)
A lukewarm sponge bath can help bring a fever down, especially when medication hasn’t fully kicked in yet. The key word is lukewarm: water between 90°F and 95°F. Sponge for 20 to 30 minutes, focusing on the forehead, neck, and armpits.
Never use cold water, ice packs directly on skin, or rubbing alcohol. Cold water causes blood vessels to constrict and triggers shivering, which actually raises your core temperature. Rubbing alcohol can be absorbed through the skin and is toxic. If you or the person you’re caring for starts shivering during sponging, stop immediately.
Eating When You Don’t Feel Like It
The old saying “starve a fever” is wrong. Your body’s energy demand increases with every degree your temperature rises. You need calories to fuel the immune response, even if your appetite has disappeared.
You don’t need to force full meals. Stick to bland, easy-to-digest foods: crackers, bananas, applesauce, dry toast, and soups. Chicken soup is genuinely helpful because it combines fluid, electrolytes, and calories in a form that’s easy on a queasy stomach. Hot herbal tea with lemon and honey is soothing and provides a small dose of vitamin C. Honey also has mild antiviral properties, though it should never be given to children under one year old.
How Long Fever and Chills Typically Last
For most viral infections, fever resolves within five to seven days, though lingering symptoms like fatigue and mild body aches can stretch to two weeks. The chills usually disappear once your fever breaks for good, which often happens in waves. You may feel better in the morning and worse in the evening for a few days before the fever fully clears.
If you’re still running a fever after seven days, or if your symptoms are getting worse instead of gradually improving, it’s time to contact a doctor. The same goes for shortness of breath, chest pain, or signs of dehydration that aren’t improving with oral fluids.
Red Flags That Need Immediate Attention
Most fevers are caused by common viruses and resolve on their own. But certain combinations of symptoms can signal something more serious, like bacterial meningitis or sepsis. Get emergency care if a fever comes with any of the following:
- Stiff neck combined with a severe headache
- Confusion or difficulty staying alert
- Seizures
- A rash that doesn’t fade when you press on it
- Sensitivity to light along with vomiting
- Temperature above 104°F (40°C)
For infants, the thresholds are much lower. Any fever of 100.4°F (38°C) or higher in a baby under three months old is considered high risk and needs medical evaluation right away. For babies between three and six months, a temperature of 102.2°F (39°C) or above puts them in an intermediate risk category. Other warning signs in infants include constant crying, lethargy, poor feeding, no wet diapers, and a bulging soft spot on the head.