What to Do After Taking an Over-the-Counter Flu Test

Seeing a positive flu test can feel overwhelming—especially when you’re already exhausted, achy, and just trying to get through the day. While at-home flu tests are convenient, understanding what the result really means (and what to do next) can help you recover faster and protect the people around you. This guide walks you through how to interpret your test, manage symptoms, and know when it’s time to get medical care.

What Does a Positive Flu Test Mean?

Over-the-counter flu tests can vary in accuracy, but they’re more likely to miss a flu infection (false negative) than to incorrectly say you have one (false positive).

So, if your test comes back positive, there’s a good chance you truly have the flu. At that point, it’s best to focus on rest, symptom relief, and deciding whether additional care or treatment is needed.

What Does a Negative Flu Test Mean?

If your flu test is negative but you still feel awful, you’re not imagining things. There are a few common reasons this can happen.

False Negatives

A negative result doesn’t always mean you’re flu-free. False negatives can occur if:

  • The swab wasn’t collected properly
  • The test has a lower accuracy rate
  • You tested very early, before the virus had time to build up in your system

Early in an illness, some at-home tests may only detect the flu 60–65% of the time (Pubmed, 2022).

 

Other Infections With Similar Symptoms

Flu-like symptoms can be caused by other illnesses, including:

  • Strep throat: A bacterial infection that often causes sudden, severe sore throat, pain with swallowing, fever, and swollen lymph nodes. Unlike the flu, strep usually does not include cough, runny nose, or congestion.
  • Bronchitis: An inflammation of the airways that typically develops more gradually. Symptoms often include a lingering cough, increased mucus, and little or no fever. Flu symptoms usually start suddenly and include intense body aches and higher fever.   
  • COVID-19: COVID can look very similar to the flu, with fever, body aches, and cough. It may also include loss of taste or smell, shortness of breath, nausea, diarrhea, or long-lasting symptoms (often called long COVID). Not everyone has the same symptoms, which is why testing for both flu and COVID at the same time is common.

What Should I Do If I Have a Positive Flu Test?

You have a few options, depending on how severe your symptoms are and how quickly you’re able to get care:

  1. Manage symptoms at home
  2. Seek treatment for antiviral medications
  3. Confirm the result and test for possible co-infections that may require additional treatment

 

Managing Flu Symptoms at Home

Stay Hydrated

Fluids help replace what your body loses through fever, sweating, coughing, and congestion. Staying hydrated also:

  • Helps thin mucus so it’s easier to clear
  • Supports circulation and oxygen delivery
  • Prevents dizziness and fatigue
  • Helps regulate body temperature

Water, electrolyte drinks, broths, and herbal teas are all good options.

Get Plenty of Rest

Rest gives your immune system the energy it needs to fight the virus. Quality sleep helps:

  • Reduce inflammation
  • Ease body aches and headaches
  • Shorten how long symptoms last
  • Lower the risk of complications

Try to limit physical and mental activity and aim for 6–8 hours of sleep or more if your body needs it.

Practice Good Hygiene

Good hygiene protects the people around you and helps prevent additional infections while your immune system is already working hard. Wash your hands often, cover coughs and sneezes, and avoid close contact with others when possible.

 

Use Over-the-Counter Medications Safely

While OTC medications don’t cure the flu, they can help you feel more comfortable:

  • Acetaminophen or ibuprofen for fever, headaches, and body aches
  • Decongestants for nasal congestion. Be careful with these medications if you have other health conditions such as high blood pressure. Consult your medical provider.
  • Antihistamines for runny nose and sneezing
  • Cough suppressants or expectorants for cough and chest congestion

Always follow label instructions, avoid doubling up on the same active ingredients, and never give aspirin to children or teens.

When to Consider Antiviral Medications

Prescription antiviral medications, such as Tamiflu (Oseltamivir), can shorten how long the flu lasts and reduce the risk of complications—especially if started within 48 hours of symptom onset.

Because these medications require a prescription, it’s important to talk to a healthcare provider as soon as possible. Telehealth options, such as those available through our website (in GA, FL, or MD), can make it easier to connect with a licensed provider without leaving home.

Beware of Co-Infections

It’s possible to have the flu at the same time as another infection, such as COVID-19 or strep throat. When this happens, symptoms can become more severe or worsen quickly. If your symptoms are intense, unusual or last longer than 7-10 days, testing for multiple infections may be the safest option and seeing your healthcare provider is recommended.

Warning Signs That Need Immediate Medical Attention

Most people recover from the flu with time and rest; however, seek urgent medical care if you experience:

  • Trouble breathing or shortness of breath
  • Bluish lips or face
  • Chest pain or pressure
  • Confusion or severe dizziness
  • Symptoms that improve but then suddenly get worse
  • Severe or persistent vomiting/diarrhea
  • A high fever that doesn’t respond to medication

Frequently Asked Questions

How Accurate Are At-Home Flu Tests?

Some at-home flu tests are 90–94% accurate compared to PCR tests when used at the right time. Accuracy is lower during the first day of symptoms, when viral levels may still be too low to detect (CDC, 2026).

When Should I Seek Immediate Medical Care?

Seek care right away if you experience:

  • Difficulty breathing
  • Blue or gray lips or face
  • Chest pain
  • Confusion
  • Worsening symptoms after initial improvement
  • Persistent vomiting
  • Fever that won’t come down with medication

What Are the Benefits of visiting Urgent Care or Seeing a Doctor?

  • Additional testing for co-infections
  • Chest X-rays to rule out complications
  • Access to antiviral prescriptions and other treatments

What Are the Benefits of a Virtual Visit?

Faster and more convenient than an in-person visit

  • Providers can assess symptoms and risk factors
  • Prescriptions can be sent directly to your pharmacy

How Do At-Home Flu Tests Work?

Most at-home flu tests are antigen-based, meaning they detect proteins from the virus. PCR tests are different—they amplify genetic material and are more sensitive, but usually take 24-48 hours to result and require a lab.

Can I Use Insurance or an FSA to Pay for My Test?

  • FSA funds can typically be used
  • Insurance coverage varies and often requires the test to be done by a medical provider
  • Check with your insurer for reimbursement forms and required diagnostic codes (CPT codes).

I Had a Negative Flu Test but Still Feel Terrible. Why?

  • Testing too early can lead to false negatives
  • Swab collection or timing errors can affect results
  • Another respiratory infection may be causing your symptoms

What’s the Difference Between Flu Type A and Flu Type B?

Both cause similar symptoms, but:

    • Type A infects humans and animals, mutates quickly, and can cause pandemics
    • Type B infects only humans, appears later in flu season, and mutates more slowly

I Got the Flu Vaccine—Why Did I Still Get Sick?

Flu viruses change over time, and vaccines can’t always match every strain perfectly. Even when they don’t prevent illness entirely, vaccines often reduce how severe symptoms are and lower the risk of complications.