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Dr. Chrysoula I. Liakou MD, PhD
- Treated online: Yes, usually. A chest infection is assessed by video; antibiotics are prescribed where bacterial infection or a risk profile justifies them, and breathlessness at rest, chest pain with fever or confusion mean in-person care.
- What it is: an umbrella term for bronchitis (the airway tubes, usually viral, clears on its own) and pneumonia (the lung tissue, more serious, usually needs antibiotics).
- How long: bronchitis-type infections settle in 3 to 4 weeks; treated pneumonia improves in stages, with fever settling within days but tiredness and breathlessness on exertion taking 4 to 6 weeks.
- Pneumonia signs: high or persistent fever, breathlessness on mild exertion, sharp chest pain on breathing in, rust-coloured phlegm, a fast pulse, or new confusion; in older people pneumonia can cause little or no fever.
- Warning pattern: fever that settles and then returns during a chest infection is a sign that deserves review.
- Emergency: call 112 if breathing is hard; breathlessness at rest, confusion or unusual drowsiness, coughing up blood, or chest pain with a high fever need in-person care now.
If you are breathless at rest, confused or unusually drowsy, coughing up blood, or have chest pain with a high fever, do not book a video appointment: get in-person care today, and call 112 if breathing is hard.
Can an online doctor treat a chest infection?
Often, yes. A doctor can assess a chest infection by video: how the illness developed, your fever pattern, your breathing on camera and your risk factors together usually show whether this is bronchitis, which settles on its own, or possible pneumonia, which needs examination and antibiotics. Where pneumonia is a real possibility, in-person assessment comes first.
Chest infection is the phrase patients use; doctors hear it as two questions: which part of the chest, and how unwell? Medically, these illnesses sit under the umbrella of lower respiratory tract infections, so if you were told you have an RTI or searched for one, this page is about the same thing. What follows is how that sorting is done, and what online care can and cannot honestly do about each answer.
Listen: Chest Infection Treatment Online
The audio version of this topic from the Mobi Doctor podcast. Open the episode.
How an online consultation helps with a chest infection
- Bronchitis or pneumonia, answered methodically: the doctor counts the pointers that separate a self-limiting airway infection from an infection of the lung tissue itself, the distinction every other decision hangs on.[2]
- Antibiotics when they will work: viral chest infections do not respond to antibiotics, and bacterial ones usually do. You get the reasoning out loud, and a prescription to a nearby pharmacy when the assessment supports one.
- Risk-adjusted honesty: age, pregnancy and existing lung, heart, kidney or immune conditions genuinely change the threshold for treating and for escalating, and the doctor applies those thresholds openly.[1]
- A written safety net: you finish knowing what should improve within 48 hours, which exact changes mean examination, and where to go if they happen.
What the doctor checks in an online chest infection consultation
The assessment is structured around how unwell you are, not just what you cough up. The doctor will typically check:
- The timeline: a cold that slid into a chesty cough suggests bronchitis; a rapid decline with fever and breathlessness suggests pneumonia.
- Fever behaviour: height, duration, and especially the "double sickening" pattern of improvement followed by a returning fever, a classic pneumonia pointer.[2]
- Your breathing on camera: rate, effort, and whether talking leaves you short of breath, observed directly during the call.
- What you cough up: volume, colour, and any rust-coloured or blood-streaked phlegm, which moves the assessment to in-person care.
- Chest pain: pain that catches sharply when you breathe in points towards the lung surface and needs examination.
- How unwell you are overall: eating, drinking, standing, thinking clearly; in older people, new confusion can be the loudest sign of pneumonia.
- Your risk profile: age over 65, pregnancy, smoking, diabetes, and lung, heart, kidney, liver or immune conditions, which lower every threshold.[1]
- Home readings if you have them: a thermometer reading and a pulse-oximeter figure sharpen the picture; neither is required.
Do I need antibiotics for a chest infection?
It depends which chest infection you have. Bronchitis is usually viral, and antibiotics make little or no difference to it. Pneumonia is usually bacterial, and antibiotics are the treatment. Doctors also prescribe earlier for people at higher risk of complications, such as older adults and those with serious long-term conditions. The assessment, not the phlegm colour, decides.[1][3]
Antibiotics are only prescribed when there are genuine signs of bacterial infection, because using them for viral illness adds side effects without benefit and drives antibiotic resistance for everyone.[4] If you are prescribed a course, take it as directed and expect the fever to improve within a few days; a chest infection that worsens on antibiotics needs review, usually in person, rather than a different guess.
What are the signs a chest infection is pneumonia?
Suspect pneumonia rather than bronchitis when a chest infection makes you unwell out of proportion to a cough: high or persistent fever, breathlessness on mild exertion, fast breathing or heartbeat, sharp chest pain on breathing in, rust-coloured phlegm, new confusion, or worsening again after you had started to improve.[2]
Any of those signs means same-day examination: a doctor listening to your chest, sometimes a chest X-ray, and blood tests where needed. None of that can happen through a screen, which is exactly why an honest online service treats spotting these signs, and saying so plainly, as part of the job. The overlap with flu also matters: influenza can itself cause a severe chest picture and opens the door to bacterial pneumonia behind it.
Chest infection symptoms: likely first step and where care happens
Swipe sideways to compare →
| Presentation | Likely first step | Suitable for online care? | When referral or in-person care is needed |
|---|---|---|---|
| Chesty cough after a cold, mild or settling fever, breathing comfortable | Bronchitis pattern: self-care and a written safety net, no antibiotics | Usually yes | If not settling by three weeks, or any warning sign appears |
| Productive cough with fever, unwell but breathing comfortably at rest | Video assessment; antibiotics where bacterial signs or risk factors justify them | Often yes | Examination when the picture stays unclear or worsens within 48 hours |
| Breathless on mild exertion, chest pain on breathing in, or fever returning after improvement | Possible pneumonia: same-day examination, sometimes an X-ray | Online for triage only | In-person the same day[2] |
| Chest infection in someone over 65, pregnant, or with lung, heart or immune conditions | Early assessment with a low threshold for examination | Sometimes, as first triage | In-person review readily, even with milder symptoms[1] |
| Breathless at rest, blue lips, confusion, coughing up blood | Emergency care | No | Call 112 immediately |
Not sure which chest infection you have? A doctor can tell you in one consultation.
See available times →How long does a chest infection last?
Bronchitis-type chest infections settle over one to three weeks, with the cough routinely the last symptom standing.[3] Treated pneumonia improves in stages: fever within days of starting antibiotics, but tiredness, breathlessness on exertion and a lingering cough can take several weeks, and feeling fully yourself can take longer still. Slow is normal; going backwards is not.
Recovering well
Rest properly in the first week rather than pushing through, drink enough, and rebuild activity gradually. Do not smoke while your lungs repair, and treat a returning fever, new breathlessness or worsening cough as a review trigger rather than bad luck. After pneumonia, some countries arrange follow-up or a repeat X-ray for certain groups; the doctor tells you whether that applies to you, and it is worth attending.
Special situations
Older adults
Pneumonia in older people often whispers: little or no fever, but new confusion, falls, going off food or simply "not being right". Families usually notice before patients do. If that is the story in your household, aim for in-person assessment the same day, and use an online consultation to organise the fastest sensible route rather than to replace the examination.
Pregnancy
Chest infections in pregnancy deserve a lower threshold at every step: fever itself is worth treating, several antibiotic options are considered compatible with pregnancy when treatment is needed, and breathlessness beyond what pregnancy explains needs in-person review. Tell the doctor you are pregnant at the start; it changes the choices, not the care.
Existing lung conditions and children
In asthma and COPD, a chest infection and a flare of the underlying condition usually arrive together, so step up your flare plan and get assessed early; breathlessness at rest is in-person territory from the start. For children, the warning signs and thresholds are different from adults, and fever is often the first flag: our fever page covers children's thresholds by age. Repeated chest infections, in anyone, deserve an in-person work-up for an underlying cause such as bronchiectasis rather than another course of the same antibiotic.
Treatment options for chest infections
What you can do yourself
Paracetamol or ibuprofen for fever and aches, fluids in regular small amounts, honey for the cough, and genuine rest.[5] Prop yourself up a little at night if coughing is worse lying flat. Over-the-counter cough syrups have weak evidence and matter far less than fluids and time; ask the pharmacist to check any product against your regular medicines. Do not smoke, and keep others' smoke away too.
Prescription treatment
Where the assessment points to pneumonia or to a bacterial infection in someone at risk, antibiotics are the treatment, chosen and dosed per local guidance, with course lengths kept as short as effective.[1] Where it points to viral bronchitis, the honest prescription is a symptom plan and a safety net, not tablets. Codeine-based cough suppressants are opioid medicines and are not prescribed through Mobi Doctor. If wheeze runs alongside the infection, the doctor may address the airways separately, including inhaler treatment with follow-up where appropriate.
When a chest infection is treated online, and when you need in-person care
Treated online: bronchitis-pattern chest infections, with self-care and a written safety net; bacterial infections where the picture is clear and you are otherwise well, with antibiotics after assessment; early review for higher-risk patients whose symptoms are still mild; and 48-hour follow-ups to confirm treatment is working.
In-person care: anyone with pneumonia pointers, for same-day examination and sometimes an X-ray; breathlessness at rest or on mild exertion; coughing up blood; new confusion, especially in older people; babies and small children who are working hard to breathe or feeding poorly; anyone not improving within 48 hours of antibiotics; and a cough that outlasts the infection by weeks, which our cough page explains how doctors assess. In each case the consultation's value is speed and direction, not a prescription at any cost.
When to get in-person care
Get same-day in-person care if you become breathless on mild exertion, develop sharp chest pain on breathing in, cough up rust-coloured or bloody phlegm, or fever returns after you had improved. Call 112 immediately if you are breathless at rest or struggling to speak, your lips or face turn blue or grey, you become confused or unusually drowsy, your skin is cold, clammy or mottled, or you cough up more than streaks of blood.
How Mobi Doctor works
- Book a time that suits you: open daily 7am–11pm CET. You can see a doctor over video, usually within 15 minutes. No subscription, exact price up front.
- Speak to a licensed doctor about chest infections: a private video call: you describe what you feel, the doctor asks what matters, and you agree the right plan together.
- Leave with your plan: everything agreed before you hang up: your plan, and a prescription to use at a pharmacy near you where medication is clinically right for you. If your doctor decides you need to be seen in person, you get a full refund.
No sign-up needed
Not sure it’s a chest infection? Tick every symptom you have to see each condition page that mentions it. It finds the right page, not a diagnosis: a doctor gives you that on a video call.
Tap the body — an area or a point — to browse symptoms anywhere
Similar symptoms, different condition? Bronchitis can start the same way. Compare them, or look up any other symptom in the full symptom checker.
Frequently asked questions about chest infections
What is a chest infection?
A chest infection is an infection of the airways or lungs. The milder, commoner form is bronchitis, inflammation of the airway tubes, which is usually viral and clears on its own in three to four weeks. The more serious form is pneumonia, infection of the lung tissue itself, which makes people unwell out of proportion to the cough and usually needs antibiotics.
What are the symptoms of a chest infection?
A chest infection causes a persistent cough bringing up yellow, green or sometimes rust-coloured phlegm, chest tightness or pain, wheeze, breathlessness, fever, aches, headache and tiredness. With bronchitis the cough dominates; with pneumonia the fever runs high or persists, breathing becomes laboured on mild exertion, and sharp chest pain comes with breathing in.
What causes a chest infection?
Most chest infections start with a cold or flu virus spreading down into the airways; bacteria, particularly pneumococcus, cause most pneumonias and some bronchitis. Smoking, COPD, asthma, heart failure, diabetes, a weakened immune system, older age and recent flu all raise the risk of a chest infection and of it becoming pneumonia.
How do I know if my chest infection is pneumonia?
Pneumonia makes people unwell out of proportion to a cough: high or persistent fever, breathlessness on mild exertion, sharp chest pain on breathing in, rust-coloured phlegm, a fast pulse, new confusion, or worsening after improvement. Any of those signs means in-person examination without delay rather than a video assessment of a chest infection.
Can an online doctor prescribe antibiotics for a chest infection in Europe?
Yes, when the assessment shows genuine signs of bacterial infection or a risk profile that justifies early treatment. Viral chest infections do not respond to antibiotics, so the doctor explains which kind you have first. When a prescription is right, it is sent to a pharmacy near you with a clear plan for what to do if you worsen.
Why did the doctor not give me antibiotics?
Because the assessment pointed to a viral chest infection, and antibiotics do nothing against viruses. Taking them anyway means side effects without benefit and more resistant bacteria for everyone. What you should leave with instead is a symptom plan, a timeline, and the specific signs that would change the decision.
Do I need a chest X-ray for a chest infection?
Most bronchitis-type chest infections need no imaging at all. An X-ray earns its place when pneumonia is suspected, when recovery stalls, when the same chest keeps getting infected, or when a cough outlasts three weeks. The doctor tells you honestly whether yours is one of those and where to have it done.
How long does a chest infection last?
A bronchitis-type chest infection usually clears in three to four weeks, with the cough outlasting the fever. Treated pneumonia improves in stages: the fever settles within a few days of antibiotics, the cough and chest pain over two to three weeks, and tiredness and breathlessness on exertion can take four to six weeks, or longer in older people. Fever that returns after improving needs review.
How long is a chest infection contagious?
The viruses and bacteria behind a chest infection spread mainly in the first days, while you are feverish and coughing hardest. Stay home during that phase, cough into your elbow and wash your hands often. Once fever has gone and you are clearly improving, you are much less likely to pass it on, even if the cough lingers.
How do I treat a chest infection at home?
Treat a chest infection at home with rest, plenty of fluids, paracetamol or ibuprofen for fever and aches, honey or a warm drink for the cough, sleeping propped up, steam or a humid room, and no smoking. Cough suppressants add little and are best avoided for a productive cough. Review how you are doing at three days: a chest infection that is worsening rather than steady needs a doctor.
How can I prevent chest infections?
Prevent chest infections by having the yearly flu vaccine and, if eligible, the pneumococcal and COVID-19 vaccines, not smoking, washing hands often in cold season, keeping asthma, COPD and diabetes well controlled, and staying active. Repeated chest infections, three or more a year, deserve a check for an underlying cause such as COPD, bronchiectasis or reflux.
Is a chest infection different in pregnancy or older people?
In pregnancy, a chest infection is treated with rest, fluids and paracetamol, and antibiotics safe in pregnancy when needed; breathlessness is taken seriously because pregnancy already works the lungs harder. In people over 65, pneumonia can cause little or no fever, so new confusion, going off food or a fall may be the loudest signs, and the threshold for in-person assessment is lower.
- Pneumonia (community-acquired): antimicrobial prescribing (NG138), NICE, National Institute for Health and Care Excellence, 2019.
- Chest infections - adults, NICE Clinical Knowledge Summaries, revised 2024.
- Cough (acute): antimicrobial prescribing (NG120), NICE, National Institute for Health and Care Excellence, 2019.
- Antibiotic prescribing: respiratory tract infections, HSE, Health Service Executive (Ireland), reviewed 2024.
- Chest infection: signs, symptoms, causes and treatments, HSE, Health Service Executive (Ireland), accessed August 2026.
- Chest infection, NHS, National Health Service (UK), accessed October 2026.
This page is for information only and is not a substitute for a medical consultation. Guideline links are provided for transparency; treatment decisions are made with your doctor.
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Read article →Speak to a doctor about chest infections over video, usually within 15 minutes
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