Most people with the flu recover at home within about a week without needing medical treatment. The core strategy is straightforward: rest, stay hydrated, manage your fever and aches with over-the-counter medications, and keep away from other people until you’re better. That said, the details matter, especially the timeline of symptoms, what to drink, and the warning signs that mean it’s time to call a doctor.
What to Expect Day by Day
The flu typically hits fast. You can go from feeling fine to full-blown miserable in just a few hours, with fever, chills, body aches, headache, sore throat, and exhaustion arriving all at once. Fever and the worst body aches usually peak in the first two to three days, then gradually ease off.
For most otherwise healthy adults and children, uncomplicated flu resolves within about a week. The exception is cough and fatigue, which can linger for two weeks or longer, particularly in older adults. Knowing this timeline helps you avoid the common mistake of pushing yourself back into normal life too soon just because your fever broke. If the cough drags on but is slowly improving, that’s still within the normal range.
Rest and Isolation
Your body needs energy to fight the virus, and rest is the single most effective thing you can do to support that process. Sleep as much as you can, especially in the first few days. Skip exercise entirely until your symptoms have clearly improved.
Stay home and avoid contact with other people except to get medical care. Current CDC guidelines say you can return to normal activities when both of these have been true for at least 24 hours: your symptoms are getting better overall, and you haven’t had a fever without the help of fever-reducing medication. Once you do go back, take extra precautions for the next five days. Wear a mask in crowded spaces, keep your distance from others when possible, and wash your hands frequently. If your fever returns or you start feeling worse again after resuming activities, go back home and isolate.
How to Stay Hydrated
Fever, sweating, and reduced appetite can dehydrate you quickly. Water is fine, but when you’re losing fluids to fever and possibly vomiting or diarrhea, you also need to replace electrolytes. You don’t necessarily need to buy specialty drinks. A simple homemade rehydration solution works well: mix 4 cups of water with half a teaspoon of table salt and 2 tablespoons of sugar. That combination gives your intestines the right balance of sodium and glucose to absorb fluid efficiently.
Other effective options include chicken broth (not low-sodium, since you want the salt), diluted sports drinks with an extra half teaspoon of salt per 32 ounces, or even cooked baby rice cereal thinned with water and a quarter teaspoon of salt. The goal is to sip steadily throughout the day rather than gulping large amounts at once. If you’re urinating regularly and your mouth doesn’t feel dry, you’re staying ahead of dehydration.
Managing Fever and Pain
Over-the-counter fever reducers and pain relievers are the main medications you’ll use. Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) both reduce fever and ease the body aches, headache, and sore throat that come with the flu. For acetaminophen, the maximum safe dose for adults is 4,000 mg per day, but it’s easy to accidentally exceed this if you’re also taking combination cold-and-flu products that contain acetaminophen. Check the labels on every medication you’re taking to make sure you’re not doubling up.
For children, never give aspirin or any product containing salicylates during a viral illness. This combination is linked to Reye’s syndrome, a rare but serious condition affecting the brain and liver. Stick with acetaminophen or ibuprofen at doses appropriate for your child’s weight.
A fever is actually part of your immune response, so you don’t have to treat every low-grade temperature. Many people find it helpful to let a mild fever run its course during the day and only take medication at bedtime to sleep more comfortably. For adults, a temperature of 103°F (39.4°C) or higher warrants a call to your doctor. For infants under 3 months, any fever at all (100.4°F or above) needs immediate medical attention.
Other Remedies That Help
Honey can soothe a sore throat and reduce coughing, though it should never be given to children under one year old. A teaspoon in warm water or tea is enough. Warm liquids in general, whether broth, herbal tea, or just hot water with lemon, help loosen congestion and keep your throat moist.
A cool-mist humidifier in your bedroom adds moisture to dry indoor air, which can ease nasal congestion and make coughing less painful. Saline nasal spray or rinses help clear mucus from your sinuses without medication. Throat lozenges can numb soreness temporarily. Propping yourself up with extra pillows at night reduces postnasal drip and makes breathing easier.
Over-the-counter decongestants and cough suppressants can provide some relief, but they treat symptoms only and won’t shorten the illness. Use them if they help you sleep or function, but don’t feel obligated to layer on multiple medications.
When Antiviral Medication Matters
Prescription antiviral drugs can shorten the flu by roughly a day and reduce the risk of complications, but they work best when started within 48 hours of your first symptoms. The closer to symptom onset, the greater the benefit. If you’re in a high-risk group, contact your doctor as soon as you suspect you have the flu, even before a test confirms it. For otherwise healthy people, antivirals are optional and a matter of clinical judgment.
The groups at higher risk for serious flu complications include adults 65 and older, children under 2, pregnant women (including up to two weeks postpartum), and people with chronic conditions such as asthma, COPD, diabetes, heart disease, kidney or liver disorders, or a weakened immune system. People with a BMI of 40 or higher and those who have had a stroke are also at increased risk. If any of these apply to you, the 48-hour clock matters. Don’t wait to see if you feel better on your own.
Emergency Warning Signs
Most flu cases resolve without complications, but certain symptoms signal that something more serious is happening and you need medical care right away.
In adults, seek emergency care for:
- Difficulty breathing or shortness of breath
- Persistent pain or pressure in the chest or abdomen
- Persistent dizziness, confusion, or difficulty staying awake
- Seizures
- Not urinating at all
- Severe muscle pain or weakness
- Fever or cough that improves, then comes back worse
In children, the warning signs include fast or labored breathing, bluish lips or face, ribs pulling in visibly with each breath, chest pain, refusal to walk due to muscle pain, no urine for 8 hours, dry mouth, no tears when crying, or not being alert and interactive when awake. A fever above 104°F that doesn’t respond to medication also needs emergency attention. For any infant under 12 weeks, any fever at all requires a call to your pediatrician.
One pattern deserves special attention in both adults and children: feeling like you’re getting better, then suddenly getting worse. A fever or cough that returns after improving can signal a secondary bacterial infection like pneumonia, which needs different treatment than the flu itself.