For urgent after-hours in-person care the nearest clinic is White Cross Ascot, 90 Greenlane East, Remuera, Auckland. Phone 09 520 9555. For emergencies, please call an ambulance 111, or go to Auckland City Hospital, Park Road, Grafton.
Almost every winter illness starts the same way. A cough, a temperature, aching and tired. The question that follows is whether this is something to rest through or something to have looked at.
Most of the time it is a common cold and it settles on its own. Sometimes it is influenza. Occasionally it is a chest infection, and that one behaves differently. Knowing which pattern you are looking at helps you decide what to do next.
Both are the body responding to infection rather than the infection itself.
A fever is a raised body temperature, driven by the immune system making conditions less comfortable for the organism causing the illness. It is a normal response and is not harmful in itself for most healthy adults, though it makes you feel unwell.
A cough is a reflex that clears the airway. When a virus inflames the lining of the nose, throat or airways, mucus and irritation trigger that reflex. That is why a cough often outlasts everything else, sometimes for several weeks after the rest of the illness has gone.
Neither symptom on its own tells you what the cause is. The pattern does.
A common cold usually builds gradually over a day or two. It sits mostly in the nose and throat: runny or blocked nose, sneezing, sore throat, a mild cough. Fever is often absent or mild. You feel unwell but you can generally still function.
Influenza typically arrives abruptly. People often remember the hour it started. Fever tends to be higher, and there is body ache, headache and marked exhaustion. The cough is usually dry at first. The distinguishing feature is how flattened you feel, not the cough itself.
A chest infection tends to develop lower in the airways. The cough becomes more productive, breathing may feel harder, and there can be chest discomfort with coughing. Sometimes it follows on from a cold or flu that seemed to be improving and then turned. We cover this in more detail in our guide to bronchitis and chest infections.
If the sore throat dominates and the cough is minor, that is a different picture again, and our guide to tonsillitis and strep throat covers what to look for.
| Feature | Common cold | Influenza | Chest infection |
|---|---|---|---|
| Onset | Gradual, over a day or two | Sudden, often within hours | Often follows a cold or flu |
| Fever | Absent or mild | Usually higher | Can be present and persistent |
| Cough | Mild, tickly | Dry at first | Productive, sometimes painful |
| Main site | Nose and throat | Whole body | Lower airways and chest |
| Breathing | Normal | Normal | May feel harder or shorter |
| How you feel | Unwell but functioning | Flattened, aching, exhausted | Worsening rather than easing |
These patterns overlap, and one illness can follow another. They are a guide to what is likely, not a diagnosis.
For infants, older adults, people who are pregnant, and anyone with a long term heart, lung or immune condition, the threshold for getting assessed should be lower rather than higher.
If someone is severely unwell or you are worried about their breathing, do not wait for an appointment. Call 111 or go to an emergency department. For free health advice at any hour, Healthline is 0800 611 116.
For an uncomplicated cold or flu, most of what helps is simple.
Rest genuinely matters, and so does fluid. A dry or irritated throat often responds to warm drinks. Steam from a hot shower can ease a blocked nose and a tight cough. Sleeping slightly propped up can make night time coughing easier.
Pharmacy medicines can ease symptoms, and your pharmacist can advise on what suits you, particularly if you take other medication or have another health condition.
Two things worth knowing. Antibiotics do not work on viruses, so they do not help a cold or the flu, and they are only useful when a bacterial infection is present. And a cough that lingers for a couple of weeks after the rest of the illness has resolved is common and does not by itself mean something has been missed.
Timelines help you judge whether something is running its normal course or drifting.
A common cold generally peaks in the first two to three days and eases over about a week, with a residual cough or blocked nose lingering afterwards. Influenza tends to keep you flattened for several days longer, and the tiredness can persist for a week or two after the fever settles. A chest infection often takes longer again, and improvement is usually gradual rather than sudden.
What matters more than the exact days is the direction. Slowly improving is reassuring, even if slow. Plateauing for several days, or improving and then clearly deteriorating, is the pattern worth acting on.
Respiratory infections pass easily in shared spaces, and the practical steps are the ordinary ones: staying home while you have a fever, covering coughs, washing hands, and ventilating rooms where you can.
If you live or work with someone who is pregnant, elderly, undergoing treatment that affects their immune system, or has a significant heart or lung condition, extra care is worth taking even for what feels like a mild illness in you.
There is no need to have worked out the cause before you come in. That is what the assessment is for.
A GP will ask how the illness started and how it has changed, then examine you, which usually includes listening to your chest, checking your throat and ears, and taking your temperature, pulse and oxygen levels.
That examination is what separates an upper respiratory illness from a chest infection, because the chest sounds different. Depending on what is found, a swab, a blood test or a chest x-ray may be arranged, and treatment follows from that rather than from the symptoms alone.
A general medical consultation at CityMed covers this kind of assessment.
Speed and severity are the most useful clues. Colds build gradually and centre on the nose and throat. Influenza usually starts abruptly with a higher fever, body aches, headache and marked exhaustion. Neither can be confirmed from symptoms alone, and testing is sometimes used where it would change management.
The acute illness usually settles within a week or so, but a cough often continues for two to three weeks after that as the airways recover. A cough that persists beyond about three weeks, or that worsens rather than slowly improving, is worth having assessed.
Not always. Many chest infections are viral, and antibiotics do not help those. They are used when a bacterial infection is likely or confirmed. That decision comes from the examination and, where needed, tests.
The number matters less than how the person is. An adult who is alert, drinking and improving is usually less concerning than someone with a lower temperature who is drowsy, breathless or deteriorating. For infants and young children, or anyone with an existing health condition, seek advice earlier rather than waiting on a number.
Annual influenza vaccination is available in New Zealand and is recommended for many groups, including older adults, pregnant people, and those with certain long term conditions. Your GP or pharmacist can tell you whether it is funded for you and when it is available.
If a fever or cough is not settling, or you would rather have it looked at than wait it out, CityMed provides general practice care in Auckland CBD.
Book an appointment or get in touch, or call 09 377 5525.
This article is general health information and is not a substitute for individual medical advice. If you are unwell, please speak with your GP or another registered health professional.
