If you have the flu, the most important steps are rest, fluids, and deciding whether you need antiviral medication. Antivirals work best when started within 48 hours of your first symptoms, so the clock matters. For most people, the flu resolves on its own in about a week, but knowing what to do in those first hours and days can shorten your illness, ease your misery, and protect the people around you.
Call Your Doctor Early if You’re at Higher Risk
Antiviral medication can shorten the flu by about a day and reduce the chance of complications, but it’s most effective when you start it within 48 hours of feeling sick. Even starting within 72 hours still offers some benefit. Your doctor can call in a prescription based on a phone visit in many cases, so don’t wait for an in-person appointment if time is tight.
Not everyone needs antivirals, but certain groups should contact a doctor as soon as flu symptoms appear:
- Adults 65 and older
- Children younger than 2
- Pregnant women (and up to two weeks postpartum)
- People with asthma, diabetes, heart disease, kidney or liver disorders, or chronic lung conditions
- People with weakened immune systems from conditions like HIV or cancer treatment
- People with a BMI of 40 or higher
- People who have had a stroke
- Residents of nursing homes or long-term care facilities
If you fall into any of these categories, don’t wait to see how the flu plays out. Early treatment significantly lowers your risk of hospitalization.
Managing Symptoms at Home
The flu hits hard and fast. Unlike a cold, which creeps in with a scratchy throat and sniffles, the flu typically announces itself with sudden fever, body aches, chills, and exhaustion. You may also have a cough, sore throat, and headache. Most symptoms peak in the first two to three days and gradually improve over five to seven days, though fatigue and cough can linger for two weeks.
For fever and body aches, over-the-counter pain relievers like acetaminophen or ibuprofen are your main tools. Follow the dosing instructions on the label carefully. If you have a history of stomach ulcers, kidney disease, liver disease, or heart problems, check with a pharmacist or doctor before taking ibuprofen, as it can worsen these conditions. Acetaminophen is generally gentler on the stomach but can damage the liver if you exceed the recommended dose, especially if you drink alcohol. Never combine multiple products that contain the same active ingredient, which is easy to do accidentally with cold-and-flu combination medicines.
Fluids matter more than food during the flu. Fever and sweating drain your body’s water supply quickly. Water, broth, electrolyte drinks, and herbal tea all help. If you’re urinating less than usual or your mouth feels dry, you’re already behind on fluids. Eat when you can, but don’t force it. Small, bland meals are easier to tolerate than large ones.
When to Go to the Emergency Room
Most flu cases don’t need emergency care, but certain warning signs signal that the illness has become dangerous. In adults, get medical care right away if you experience:
- 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 weakness or unsteadiness
- Fever or cough that improves, then comes back worse
That last one is particularly important. A “second wave” of worsening symptoms after you seemed to be getting better often signals a secondary bacterial infection like pneumonia. This pattern needs prompt medical attention.
For children, the list includes all of the above plus fast breathing, ribs pulling in with each breath, bluish lips or face, severe muscle pain (a child refusing to walk), no urine for eight hours, and fever above 104°F that doesn’t respond to medication. Any fever in a baby younger than 12 weeks needs immediate evaluation regardless of other symptoms.
Protecting Everyone Else in Your Home
The flu spreads through respiratory droplets and contaminated surfaces, so your household needs a plan. Stay in a separate room as much as possible. Use a separate bathroom if you have one. If you must be in shared spaces, wear a mask and wash your hands frequently.
Surfaces you touch regularly are the biggest transmission risk in a household. Focus cleaning efforts on doorknobs, light switches, faucet handles, countertops, phones, and remote controls. Use a disinfectant labeled as effective against influenza A, or make a bleach solution: one tablespoon of bleach in one quart of water. Apply it to surfaces with a cloth, let it sit for three to five minutes, then rinse with clean water. For electronics, disinfecting wipes work well, but check the label for how long the surface needs to stay wet to actually kill the virus. One quick swipe usually isn’t enough.
Linens, towels, and dishes used by the sick person don’t require special handling, but they shouldn’t be shared before washing. Regular laundry detergent and a normal dishwasher cycle are sufficient. Wash your hands with soap and water after handling dirty laundry, used tissues, or trash from the sick person’s room. Avoid touching used tissues directly when emptying wastebaskets.
When You Can Return to Normal Life
You can go back to work, school, or other activities when both of these have been true for at least 24 hours: your symptoms are improving overall, and you haven’t had a fever without using fever-reducing medication. That second part is key. If your temperature only stays normal because you’re taking acetaminophen or ibuprofen every few hours, the clock hasn’t started yet. Wait until you’re genuinely fever-free for a full day before going back out.
Even after you meet that 24-hour threshold, you may still be shedding some virus. Washing your hands frequently and covering coughs during the first few days back will reduce the chance of spreading it to coworkers or classmates. If your cough or fatigue persists beyond two weeks, or if you develop new symptoms like thick colored mucus, ear pain, or worsening shortness of breath, check in with your doctor to rule out a secondary infection.