 which flu symptoms should i check for  which flu symptoms should i check for  flu symptoms flu symptoms usually start suddenly and appear one to three days after you have caught the viral infection they commonly include fever sore throat cough headache muscle or body aches fatigue or nausea and vomiting but this is less common in adults compared with children children will also often experience accompanying diarrhoea and abdominal pain who is at risk of severe flu  certain groups are at greater risk of serious illness and hospitalisation from the flu and should see a doctor if they experience flu symptoms these include babies pregnant mums older australians and aboriginal and torres strait islander people other people at increased risk include smokers and those who have not been vaccinated against the flu in addition people with the following longterm medical conditions should see a doctor if they have flu symptoms heart disease lung disease down syndrome obesity conditions of the nervous system such as multiple sclerosis liver disease kidney disease diabetes blood diseases and metabolic disorders warning signs of severe flu even if you are young and healthy and not in any of the risk groups listed above you should see a doctor promptly if you have flu symptoms and you are worried or if you experience symptoms for longer than 7 days are vomiting frequently and or are unable to drink fluids have an intense headache are pale and feel sleepy have chest pain have trouble breathing develop a rash with fever experience neck stiffness or find light hurts your eyes flu can sometimes lead to complications the symptoms of influenza are not just limited to the infection itself sometimes a case of the flu can lead to complications including bronchitis croup pneumonia ear infections heart and other organ damage and brain inflammation and brain damage ask for advice talk to your gp or pharmacist about flu vaccines and how you can protect yourself against the flu healthy tue 7262022 1412  