The symptoms of
influenza (flu) appear suddenly and often
100.4°F (38°C) to
104°F (40°C), which can reach
106°F (41°C) when symptoms
first develop. Fever is usually continuous, but it may come and go. Fever may
be lower in older adults than in children and younger adults. When fever is
high, other symptoms usually are more severe.
Body aches and muscle
pain (often severe), commonly in the back, arms, or
Pain when you move your
Fatigue, a general feeling of sickness (malaise), and loss of
A dry cough, runny nose, and dry or sore throat. You may
not notice these during the first few days of the illness when other symptoms
are more severe. As your fever goes away, these symptoms may become more
Some people get infected with the flu virus but do not have any symptoms.
Influenza usually does not cause symptoms in the stomach or
intestines, such as vomiting and diarrhea.
Other conditions have symptoms similar to the flu, such as the common cold, bacterial
infections, and infectious
In this article
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
September 09, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this