Recognizing flu symptoms is the first step in treating and preventing the flu. Flu symptoms come on fast, so if you or a family member have the symptoms below, call your doctor right away.
Primary symptoms are:
Fever (100° F or greater)
A fever occurs when your body temperature increases in response to illness or injury. Your temperature is considered elevated when it is 100° F or greater.
Muscle aches
Body aches that are sudden and unexplained can be a sign of the flu.
Chills
Body chills not related to a cold environment can be a sign of the flu.
Other symptoms you may experience include:
Headache
A headache associated with the flu may appear suddenly and be accompanied by body aches or nasal congestion.
Sore throat
Swelling in the throat can cause a sore throat.
Runny nose
A runny nose may occur, but is more common in children than adults.
Stomach symptoms
Nausea, vomiting and diarrhea. These are more common in children than adults.
Chest discomfort, cough
Chest discomfort is often severe with the flu.