A flu illness can turn a normal morning into a day on the couch surprisingly fast. One minute you are managing work, school drop-off or a full calendar. The next, you have fever, body aches and an exhaustion that feels out of proportion to a typical cold.
Flu, also called influenza, is a contagious viral infection that affects the nose, throat and lungs. Most healthy adults recover with rest and supportive care, but flu can be more serious for some people and may lead to complications such as pneumonia. Knowing what to watch for can help you make a practical decision about home care, a GP consultation or urgent medical attention.
How flu symptoms usually feel
Flu symptoms often begin suddenly. A cold may build over a few days with a runny nose or scratchy throat, while influenza can leave you feeling unwell within hours. Common symptoms include fever or chills, headache, muscle and joint aches, tiredness, a dry cough, sore throat and reduced appetite.
Some people also experience a blocked or runny nose, nausea, vomiting or diarrhoea. These stomach symptoms are more common in children than adults. Not everyone with flu has a fever, particularly older adults or people whose immune system does not respond strongly to infection.
A cold, COVID-19 and flu can overlap, so symptoms alone cannot always tell you which virus you have. If knowing the cause will change what you do, such as protecting a vulnerable household member, a test and GP advice may be useful.
Flu or a cold: what is the difference?
The distinction matters because flu is more likely to cause a sharp decline in how you feel. With a cold, people can often continue with lighter versions of their usual routine. With influenza, fatigue, fever and body aches can make ordinary tasks difficult.
Flu can also cause a cough that lingers after other symptoms improve. That does not automatically mean there is a complication, but a cough that is worsening, associated with shortness of breath, or still troubling you after several weeks should be assessed.
Managing flu at home
For many people, the best treatment is straightforward: rest, fluids and time. Cancel non-essential plans, avoid strenuous exercise and give your body a chance to recover. Drink regularly, even if your appetite is low. Water, soup and oral rehydration drinks can all help, especially if you have been sweating with fever or have diarrhoea.
Paracetamol or ibuprofen may help relieve fever, headache and aches when used as directed on the packet. These medicines are not suitable for everyone, so check with a pharmacist or GP if you are pregnant, have kidney disease, stomach ulcers, liver problems, take blood-thinning medication or have another medical condition. Do not give aspirin to children or teenagers with a viral illness unless a doctor has specifically advised it.
Antibiotics do not treat flu because influenza is caused by a virus, not bacteria. A GP may consider antibiotics only if there is concern about a bacterial infection developing alongside or after the flu.
Can antiviral medicine help?
Antiviral medicines may reduce the length or severity of flu for some patients, particularly people at higher risk of complications. They work best when started early, usually within the first 48 hours of symptoms. They are not necessary for every person with flu, and whether they are appropriate depends on your symptoms, health history, pregnancy status and timing.
If you are in a higher-risk group or your symptoms have started recently and are hitting hard, a same-day GP consultation can help you understand your options. An Australian-registered GP can assess your symptoms, discuss whether antiviral treatment may be suitable and advise on the right next step.
When to speak with a GP about flu
It is sensible to seek GP advice if you are feeling very unwell, symptoms are not improving after a few days, or you begin to improve and then become worse again. A consultation is also worthwhile if fever lasts longer than expected, your cough becomes more severe, or you are struggling to keep fluids down.
You should contact a GP early if you are pregnant, aged 65 or over, have asthma, chronic lung disease, heart disease, diabetes, kidney disease, a weakened immune system, or another condition that increases your risk from respiratory illness. Parents should seek advice for babies and young children who are unwell, particularly if they are not drinking, are unusually sleepy or seem to be getting worse.
For routine flu concerns, a phone or video consultation can be a convenient starting point. TeleDoc connects patients with Australian-registered GPs for private, same-day care when appropriate, without the need to sit in a waiting room while unwell. A doctor can also advise if an in-person examination, testing or further treatment is needed.
When flu needs urgent care
Flu can occasionally become serious. Call 000 or seek urgent medical care if you or someone else has trouble breathing, chest pain or pressure, blue or grey lips, confusion, fainting, a seizure, severe weakness, or is difficult to wake.
Urgent assessment is also needed for signs of dehydration, such as very little urine, severe dizziness or an inability to keep fluids down. For children, watch for fast or difficult breathing, a bluish colour around the lips, no tears when crying, fewer wet nappies, a rash that does not fade when pressed, or unusual drowsiness and irritability.
Trust your judgement if something feels seriously wrong. A virtual consultation is useful for many everyday flu questions, but severe symptoms need immediate in-person emergency care.
Reducing the chance of spreading flu
Influenza spreads through respiratory droplets and contaminated hands or surfaces. You may be infectious before you fully realise you are sick, and you can continue to spread the virus while symptoms are present. Staying home while you are feverish or feeling significantly unwell is one of the most practical ways to protect colleagues, classmates and family members.
Cover coughs and sneezes with a tissue or your elbow, wash your hands often, avoid sharing drinks and utensils, and improve airflow where possible by opening windows. If you need to be around others while recovering, consider wearing a well-fitted mask, especially near older people, babies or anyone with a weakened immune system.
Return to your normal routine when you are feeling well enough to participate and your fever has settled without fever-reducing medicine. If your workplace, school or local public health advice has specific requirements, follow those as well.
The flu vaccine is worth planning for
The annual flu vaccine remains the best available protection against influenza and its complications. The strains included in the vaccine are updated because flu viruses change over time. Vaccination may not prevent every infection, but it can lower the risk of becoming seriously unwell and passing flu on to others.
It is particularly valuable for people at higher risk, as well as those who live with or care for them. If you are unsure whether vaccination is suitable for you, or when to have it alongside other vaccines, a GP can provide individual advice.
Flu is rarely convenient, but prompt, sensible care can make the recovery period easier to manage. Rest early, keep an eye on symptoms, and get medical advice when your risk factors or recovery do not look straightforward.
