The flu can hit fast and leave you feeling completely drained. One day you may feel fine, and the next you are dealing with fever, chills, body aches, fatigue, and a cough that makes it hard to get through the day. While many people recover at home with rest and fluids, some symptoms may signal it is time to seek medical care.
Knowing what flu symptoms are common, how recovery usually works, and when symptoms may be more serious can help you decide when to stay home and when to visit urgent care.
What is the flu caused by?
The flu, also called influenza, is caused by influenza viruses that infect the nose, throat, and lungs. It spreads easily through respiratory droplets when someone coughs, sneezes, or talks.
You can also catch the flu by touching surfaces that have the virus on them and then touching your eyes, nose, or mouth.
Unlike a common cold, flu symptoms often come on suddenly and can feel much more intense. Many people describe it as feeling like they were “hit by a truck” because of the severe fatigue and body aches.
When is flu season?
Flu season typically starts in the fall and peaks during the winter months. In most areas, flu activity increases in October and can continue through spring, with the highest number of cases often happening between December and February.
Even outside of peak season, it is still possible to get the flu.
How do you know it’s the flu?
Sometimes it is hard to tell whether you have the flu or a cold, since symptoms can overlap. However, the flu usually comes on faster and causes more intense symptoms.
Signs that often point toward the flu include:
- Sudden fever or chills
- Body aches and muscle soreness
- Extreme fatigue or weakness
- Dry cough
- Headache
- Sore throat
- Congestion or runny nose
A cold tends to develop more gradually and is usually milder.
What are 5 symptoms of flu?
While symptoms vary from person to person, five of the most common flu symptoms include:
- Fever or chills – A fever is common, though not everyone gets one.
- Body aches – Muscle soreness is often more severe than with a cold.
- Fatigue – Feeling unusually tired or weak is one of the most common complaints.
- Cough – Often dry and persistent.
- Headache – Frequently paired with fever or body aches.
Some people may also experience sore throat, congestion, nausea, or stomach related symptoms.
How do you know if it is stomach flu?
Many people use the term stomach flu, but it is not the same thing as influenza. Stomach flu is usually caused by a different virus that affects the digestive system, often called viral gastroenteritis.
Symptoms of stomach flu may include:
- Nausea
- Vomiting
- Diarrhea
- Stomach cramps
- Mild fever
The flu mainly affects the respiratory system, while stomach flu affects the stomach and intestines.
How to get rid of the flu quickly?
There is no instant cure for the flu, but there are steps you can take to feel better and support recovery.
Things that may help include:
- Getting plenty of rest
- Drinking fluids to avoid dehydration
- Taking over the counter fever or pain relievers when appropriate
- Eating light, easy to tolerate foods
- Avoiding strenuous activity while recovering
In some cases, antiviral medications may help shorten the illness if started early. These medications often work best when taken within the first couple of days after symptoms begin.
What’s normal during flu recovery?
Most people begin feeling better within several days, though some symptoms can linger.
Symptoms that are often considered normal during flu recovery include:
- Fever improving after a few days
- Lingering fatigue or low energy
- Mild cough that continues for a week or longer
- Reduced appetite
- Mild congestion or sore throat
It is common to feel tired even after the worst symptoms improve.
Red flags: When to visit urgent care for flu symptoms
Sometimes the flu becomes more serious or leads to complications.
Consider visiting urgent care if you experience:
- Trouble breathing or shortness of breath
- Chest pain or pressure
- Fever that will not improve or returns after getting better
- Severe dehydration or dizziness
- Symptoms improving and then suddenly worsening again
- Persistent vomiting
- Extreme weakness or confusion
Young children, older adults, pregnant individuals, and people with chronic health conditions may be at higher risk for complications and should be monitored closely.
When to visit urgent care
Most cases of the flu improve with rest, fluids, and time. However, if symptoms feel severe, fever will not break, breathing becomes difficult, or dehydration becomes a concern, urgent care can help evaluate what is going on and recommend treatment options. Getting checked early may help you feel better sooner and reduce the risk of complications.
