Signs & Symptoms of Flu & No Fever

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It can be difficult to determine if you have influenza, also called "the flu." In most cases, fever is a symptom of the flu, but it is possible to have the flu without any fever.

It's not always easy to know that you have the flu.
It's not always easy to know that you have the flu. (Image: Visage/Stockbyte/Getty Images)

Sudden Onset

If you have the flu, your symptoms usually come on very suddenly. The viral infection starts very abruptly without any warning signs.

Flu symptoms tend to come on very suddenly.
Flu symptoms tend to come on very suddenly. (Image: Visage/Stockbyte/Getty Images)

Body Aches

You will feel achy or somewhat sore all over, but look for soreness in your back, arms and legs. Your entire body will feel sick.

Your whole body will probably be sore.
Your whole body will probably be sore. (Image: Comstock Images/Comstock/Getty Images)

Dry Cough

Usually, you will notice a dry, hacking cough. A dry cough is one that does not produce mucus or phlegm.

You might get a dry cough.
You might get a dry cough. (Image: Stockbyte/Stockbyte/Getty Images)

Fatigue and Weakness

If you have the flu, fatigue will basically take over your body, and you will feel so weak that you will not want to get out of bed.

Fatigue and weakness are common flu symptoms.
Fatigue and weakness are common flu symptoms. (Image: James Woodson/Digital Vision/Getty Images)

Stomach Symptoms

Stomach symptoms, such as vomiting and diarrhea, can occur with the flu. Those symptoms are more common in children than adults.

Vomiting and diarrhea are more common flu symptoms for children.
Vomiting and diarrhea are more common flu symptoms for children. (Image: Visage/Stockbyte/Getty Images)

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