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Symptoms of the flu can vary greatly in intensity and seriousness among individuals. Symptoms can be mild and "cold-like", including runny nose, sneezing, and nasal congestion. Symptoms can also be more uncomfortable and serious and include fever above 101 degrees F, coughing, body aches, headache, extreme fatigue, and sore throat. Children may experience abdominal pain, vomiting, and seizures.
When the symptoms of the flu break down the body's defences, more serious, even life-threatening infections caused by bacteria can invade the body. These include pneumonia, acute bronchitis, and encephalitis. Certain populations are more at risk for getting the flu and developing its serious complications. They include infants and young children, residents of long-term care facilities, pregnant women, and health care workers. Other people at risk include those who are over the age of 50, are care takers for young children, or who have an immunodeficiency disorder, a suppressed immune system, or a chronic disorder, such as diabetes or cardiovascular disease....more about Flu »
The list of signs and symptoms mentioned in various sources for Flu includes the 32 symptoms listed below:
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Ocassionally other symptoms may also present themselves as symptoms of Flu. 1 of the more common ones are included in the list below:
The list of other diseases or medical conditions that may be on the differential diagnosis list of alternative diagnoses for Flu includes:
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More information about symptoms of Flu and related conditions:
Click on any of the symptoms below to see a full list of other causes including diseases, medical conditions, toxins, drug interactions, or drug side effect causes of that symptom.
The symptoms start very quickly and are
Flu can cause fever, chills, dry cough, sore throat, runny or stuffy nose, as well as headache, muscle aches, and often extreme fatigue. Although nausea, vomiting, and diarrhea can sometimes accompany the flu, especially in children, gastrointestinal symptoms rarely occur. The illness that people call "stomach flu" is not influenza. (Source: excerpt from What to Do About the Flu -- Age Page -- Health Information: NIA)
Call your doctor if you have any signs of flu and:
When considering symptoms of Flu, it is also important to consider Flu as a possible cause of other medical conditions. The Disease Database lists the following medical conditions that Flu may cause:
Incubation period for Flu: 1-3 days; perhaps 1-4 days
Incubation period for Flu: If you get infected by the flu virus, you will usually feel symptoms one to four days later. (Source: excerpt from The Flu, NIAID Fact Sheet: NIAID)
These general reference articles may be of interest in relation to medical signs and symptoms of disease in general:
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The symptom information on this page attempts to provide a list of some possible signs and symptoms of Flu. This signs and symptoms information for Flu has been gathered from various sources, may not be fully accurate, and may not be the full list of Flu signs or Flu symptoms. Furthermore, signs and symptoms of Flu may vary on an individual basis for each patient. Only your doctor can provide adequate diagnosis of any signs or symptoms and whether they are indeed Flu symptoms.
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