Flu Facts: When the Flu Becomes an Emergency
Posted on September 29, 2026
For many of us, having a bad case of the flu can be a miserable experience. But sometimes the flu can be more than just an annoying sickness. It can be downright dangerous.
How the flu can be severe
Although it takes a few days to a week or two, most people recover from the flu, which is a viral respiratory infection. But some people develop severe and potentially life-threatening complications, like pneumonia. The flu can also lead to dehydration. And it can make other health problems, like asthma or heart disease, worse.
Although anyone can develop flu complications, people at higher risk include adults over age 65, younger children and pregnant women. People with underlying health conditions—such as diabetes or heart, kidney or lung disease—are also at higher risk.
Warning signs of a flu emergency
If you have flu-like symptoms (including fever, chills, body aches and a sore throat) and you’re in a high-risk group, ask your doctor about antiviral medicines. When started early, they may help you recover sooner.
You should also pay attention to your symptoms and seek medical care right away if you have signs or symptoms of a flu emergency, which can include:
• Dizziness or confusion; or seizures
• Severe muscle pain, which can be bad enough to affect walking
• A fever or cough that improves but then returns or worsens
• Dehydration – signs include not urinating, having a dry mouth, and having no tears when crying
• A worsening of chronic health conditions
Is it an emergency?
If you’re not sure whether your flu illness rises to the level of an emergency, call your primary care provider or visit the nearest emergency room. If you need to find a provider, visit healthnewengland.org/medicare/provider.
Now’s the Time to Get the Flu Vaccine
An annual seasonal flu vaccine is the best way to reduce the chance that you will get the flu. Learn more at cdc.gov/flu. Health New England covers the flu vaccine at no cost ($0 copay) when obtained from an in-plan provider. Get it at your doctor’s office or participating retail pharmacy this fall before the flu season starts. Bring your Health New England ID card to ensure you don’t have a copay.
Sources: American Academy of Family Physicians; American College of Emergency Physicians; Centers for Disease Control and Prevention
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