If you have the flu, the most important things you can do right now are rest, stay hydrated, and manage your fever. Most people recover within one to two weeks without medical treatment, but acting quickly in the first 48 hours can shorten how long you feel sick, and knowing the warning signs of complications can keep a bad week from becoming dangerous.
Ask About Antiviral Medication Early
Prescription antiviral medication works best when started within 48 hours of your first symptoms. Within that window, it can reduce how long you’re sick by one to three days and lower the severity of your symptoms. After 48 hours, the benefit drops significantly for most people.
If you’re otherwise healthy and your symptoms are manageable, you may not need an antiviral at all. But if you fall into a higher-risk group (more on that below), contact your doctor or an urgent care clinic as soon as symptoms start. Many providers can prescribe antivirals after a phone or video visit, so you don’t need to drag yourself to an office. The medication is a twice-daily pill taken for five days.
Managing Fever, Aches, and Congestion at Home
Fever, body aches, headache, and sore throat are your body’s inflammatory response to the virus. Over-the-counter pain relievers and fever reducers are the backbone of symptom management. Acetaminophen and ibuprofen both work well. If you’re using acetaminophen, don’t exceed 4,000 milligrams in 24 hours, and check other medications you’re taking (cold medicines, sleep aids) because many contain acetaminophen too, and the totals add up fast.
For congestion and sinus pressure, saline nasal spray or a saline rinse can help loosen mucus without any medication side effects. A cool-mist humidifier in your bedroom keeps airways from drying out overnight. For a stubborn cough, honey is surprisingly effective. Studies in children over 12 months old found that honey reduced nighttime coughing and improved sleep quality better than several common cough products. Adults can stir a tablespoon into warm water or tea. Never give honey to babies under one year old.
Staying Hydrated When You Feel Terrible
Fever causes you to lose fluid through sweat much faster than normal. Add in reduced appetite and the fact that you probably aren’t drinking as much as usual, and dehydration becomes a real risk. A general guideline for daily fluid needs is roughly 25 to 30 milliliters per kilogram of body weight. For a 150-pound person, that’s about 1.7 to 2 liters (roughly seven to eight cups) as a baseline, and you need more than that when running a fever.
Water is fine, but when you’re sweating and not eating much, you’re also losing electrolytes like sodium and potassium. Drinks with electrolytes, diluted juice, broth, and soups all help replace what you’re losing. Sip steadily rather than trying to gulp large amounts at once, especially if nausea is an issue. Dark urine or going many hours without needing to urinate are signs you need to drink more.
Rest Actually Matters
This sounds obvious, but many people try to push through the flu with cold medicine and willpower. Your immune system consumes enormous energy fighting the virus, and physical activity diverts resources away from that fight. Expect to spend at least a few days mostly in bed or on the couch. Sleep as much as your body wants to. If you can take time off work, do it. You’ll recover faster, and you’ll also stop spreading the virus to others.
When to Stay Home and When to Go Back
The flu is contagious from about one day before symptoms appear through five to seven days after you get sick. The CDC recommends staying home for at least 24 hours after both of the following are true: your symptoms are improving overall, and you’ve had no fever without using fever-reducing medication. That “without medication” part is key. If your temperature only stays normal because you took ibuprofen two hours ago, the clock hasn’t started yet.
While you’re sick, try to limit contact with other household members. Use a separate bathroom if possible. Wash your hands frequently, cover coughs and sneezes, and wipe down shared surfaces like door handles and light switches.
Who Needs Medical Attention Sooner
Certain people face a higher risk of serious flu complications like pneumonia, organ damage, or hospitalization. If you’re in one of these groups, contact a doctor at the first sign of flu symptoms rather than waiting to see how things go:
- Adults 65 and older
- Children under 5 (especially under 2)
- Pregnant women and those up to two weeks postpartum
- People with chronic conditions including asthma, COPD, diabetes, heart disease, kidney or liver disorders, sickle cell disease, or a BMI of 40 or higher
- People with weakened immune systems from conditions like HIV or cancer, or from medications like chemotherapy or long-term steroids
- People with neurological conditions or disabilities that affect breathing, swallowing, or clearing the airways
- Residents of nursing homes or long-term care facilities
For these groups, the CDC recommends prompt antiviral treatment even before a flu test confirms the diagnosis.
Emergency Warning Signs
Most flu cases are miserable but not dangerous. However, certain symptoms signal that the virus has triggered a serious complication, and you should get emergency care immediately.
In adults, go to the ER if you experience difficulty breathing or shortness of breath, persistent pain or pressure in your chest or abdomen, persistent dizziness or confusion, an inability to stay awake, or seizures.
In children, watch for fast breathing or visible effort to breathe (ribs pulling in with each breath), bluish lips or face, chest pain, not being alert or interactive when awake, or seizures.
These warning signs can appear at any point during the illness, not just in the first few days. A person who seemed to be improving and then suddenly gets worse deserves urgent evaluation, because that pattern often indicates a secondary infection like bacterial pneumonia settling in on top of the flu.
A Day-by-Day Overview
Days one and two are typically the worst. Fever often spikes to 101 to 104°F, along with intense body aches, chills, headache, and fatigue. This is when antiviral medication can still make a difference, and when rest and fluids matter most.
Days three through five, fever usually begins to break and the worst of the body aches fades. Cough, congestion, and sore throat often linger or even peak during this stretch. You’ll still feel wiped out.
Days six through ten, most people are turning a corner. Energy slowly returns, though a dry cough and general fatigue can hang on for two weeks or more. Don’t mistake feeling slightly better for being fully recovered. Ease back into your normal routine gradually, and listen to your body if it’s telling you to slow down.