Flu Season: What to Do in the First 48 Hours

Flu hits fast — fever, aches and exhaustion, often in a few hours. One minute you are answering email, and the next you are shivering under a blanket wondering how you got so sick so quickly. That sudden start is one of the clearest differences between flu and a common cold, which usually creeps in over a day or two with a scratchy throat and a runny nose.

The first two days matter most. What you do in those first 48 hours can affect how sick you get, how long it lasts and whether you pass it to the people you live with. Here is the plan we share with patients every flu season. It is general guidance, so always follow advice from your own doctor, especially if you have a chronic health condition.

Is it flu or a cold?

Flu and colds are both caused by viruses, and they share some symptoms. The difference is usually in how fast and how hard they hit. Flu tends to arrive suddenly with a high fever, body aches, chills, headache and deep fatigue. A cold more often brings sneezing, a stuffy nose and a mild sore throat, and most people can still get through the day.

• Flu: sudden start, fever, body aches, chills, exhaustion, dry cough
• Cold: gradual start, runny or stuffy nose, sneezing, mild sore throat
• Both: cough, congestion, feeling run down

Other viruses, including COVID-19, can look a lot like flu. That is why testing helps. Guessing based on symptoms alone is not very reliable, and knowing what you have helps your provider choose the right next steps.

Come in early

Some treatments work best in the first 48 hours. A quick test tells us if it is flu. Antiviral medicines can shorten flu and may lower the risk of complications for some people, but they tend to work best when started soon after symptoms begin. If you wait until day four or five to see someone, those options may offer less benefit.

Early care matters most for people at higher risk of complications. That includes adults 65 and older, young children, pregnant people and anyone with conditions like asthma, diabetes, heart disease or a weakened immune system. If you or someone you care for is in one of these groups, do not wait to see whether it gets better on its own.

What happens at the visit

When you check in, a nurse will take your temperature, heart rate, oxygen level and blood pressure. Our provider will ask when symptoms started and examine your throat, ears and lungs. A rapid flu test, done with a quick nasal swab, gives results during your visit. Based on the results and your health history, the provider will talk with you about whether an antiviral makes sense, along with how to manage symptoms at home.

Rest and fluids

Stay home, drink often and keep a fever log for your visit. It sounds simple because it is. Your body does most of the work of fighting the flu, and rest gives it the energy to do that job.

Your first 48 hours at home

1. Stay home from work, school and errands to protect others
2. Rest as much as you can, even if you cannot sleep
3. Drink fluids often: water, broth, electrolyte drinks or warm tea
4. Write down your temperature, the time and any medicine you took
5. Use over-the-counter fever and pain relievers only as directed on the label
6. Eat light foods when you feel up to it, like soup, toast or rice

The fever log is more useful than most people expect. When you come in, it helps our provider see how the illness is moving. When you call with a question, it lets our nurses give better advice. A note on your phone works perfectly.

Be careful with combination cold and flu medicines. Many contain the same fever reducer as other products in your cabinet, and it is easy to take too much by accident. Check labels and ask a pharmacist if you are not sure. Do not give aspirin to children or teenagers with flu symptoms.

Comfort measures that help

A few simple comforts can make the worst days easier. A cool-mist humidifier near the bed can soothe a dry cough and stuffy nose. Warm salt-water gargles can ease a sore throat in adults and older children. Extra pillows to prop up your head may help you breathe and sleep more easily. Light layers are better than heavy blankets when a fever is high, since you can add or remove them as chills come and go. And a quiet, dim room with a phone charger and a water bottle within reach means fewer trips out of bed.

When to seek help right away

Most healthy people recover from flu at home within a week or two, though tiredness can linger. Some people develop complications, such as pneumonia, that need prompt care. Watch for warning signs, and do not hesitate to get help.

• Trouble breathing or shortness of breath
• Pain or pressure in the chest or stomach
• Confusion or difficulty waking up
• Signs of dehydration, like little or no urine
• A fever or cough that improves and then comes back worse
• In children, fast breathing, bluish lips or not drinking enough

For trouble breathing, chest pain, confusion or bluish lips, call 911 or go to the nearest emergency room. For the others, call us or your doctor as soon as possible.

Protect the rest of the house

Flu spreads easily through coughs, sneezes and shared surfaces. If one person in the household is sick, a few simple habits can help keep it from moving through everyone else.

Have the sick person rest in a separate room if possible. Wash hands often with soap and water. Wipe down doorknobs, remotes, phones and faucet handles. Do not share cups, utensils or towels. Open a window for fresh air when the weather allows. Most people are contagious for several days after symptoms start, so keep these habits going even after the fever breaks.

The best flu plan is still a yearly flu shot. We give them every day, no appointment needed.

Rachel

Rachel, our nurse manager, reminds every patient that the vaccine is the best way to lower the chance of getting flu in the first place, and it may make illness milder if you do catch it. Health agencies generally recommend a yearly flu shot for most people six months and older. Ask your doctor if you have questions about whether it is right for you.

Key takeaway: come in early for a test, rest and drink fluids at home, keep a fever log and watch closely for warning signs.

Get ready before flu season

The best time to prepare is before anyone is sick. Get your flu shot in early fall. Stock a small kit with a thermometer, a fever reducer, electrolyte drinks, tissues and easy soups. Save our number and check in online so you can reserve a spot from your couch when you need it.

It also helps to talk with your household about a plan. Decide who will pick up kids from school if a parent gets sick, which room can serve as the sick room and who can drop off groceries or medicine at the door. Those small decisions are much easier to make on a healthy afternoon than in the middle of a feverish night.

If flu hits your home this season, call or check in with us early. A quick visit in the first 48 hours can make the whole week easier.