Do not wait for a routine cough appointment
Seek Emergency Care Immediately If
- Breathing is severely difficult, the person cannot speak comfortably, turns blue, becomes confused or collapses.
- There is sudden breathlessness with severe chest or upper-back pain.
- More than a few streaks of blood are coughed up, or blood is accompanied by breathlessness, pain or a very fast heartbeat.
- A child has marked chest recession, pauses in breathing, grunting, unusual drowsiness or difficulty feeding.
- The cough began suddenly during choking and an inhaled object is possible.
- There is a severe allergic reaction with swelling of the face or tongue, noisy breathing or widespread faintness.
Arrange Prompt Medical Assessment If
- Any blood appears in the sputum, even if it is only a few spots or streaks.
- There is unexplained weight loss, reduced appetite, fever or drenching night sweats.
- Breathlessness, chest pain, persistent hoarseness or difficulty swallowing accompanies the cough.
- There is a new neck swelling, finger clubbing or repeated chest infection.
- The patient has significant smoke exposure, occupational dust exposure or a weakened immune system.
- There has been close contact with tuberculosis or a person with a prolonged unexplained cough.
- A child is not gaining weight, has feeding-related coughing, recurrent pneumonia or an abnormal breathing sound.
How Is Cough Classified by Duration?
Acute cough
Usually lasts less than three weeks and commonly accompanies a short-lived respiratory illness.
Subacute cough
Continues for roughly three to eight weeks and may follow an infection while the airway remains sensitive.
Chronic cough in adults
Usually refers to cough lasting longer than eight weeks.
Chronic cough in children
A daily cough beyond four weeks deserves a paediatric-specific evaluation.
Duration helps organise the assessment; it does not decide urgency. A short cough with severe breathing difficulty is more urgent than a long mild cough.
What Details About the Cough Matter?
- Whether it is dry or produces sputum, and the colour or amount of any sputum.
- Whether it occurs during the day, at night, on waking, with exercise or after meals.
- Sudden versus gradual onset and whether it followed an infection or choking event.
- Triggers such as talking, laughing, smells, cold air, dust or lying down.
- Associated wheeze, breathlessness, nasal symptoms, heartburn, voice change or swallowing difficulty.
- Smoking, vaping, indoor fuel smoke, mould, pets and workplace exposures.
- Previous chest disease, tuberculosis contact, travel, recurrent infection and family history.
- All prescribed, non-prescribed and traditional products being used.
Dry Cough and Wet Cough Are Clues—not Diagnoses
Dry or tickling cough
May occur after infection, with airway sensitivity, asthma-related inflammation, upper-airway irritation or an adverse effect of prescribed treatment.
Wet or productive cough
Raises questions about ongoing airway secretions, infection, aspiration or structurally widened airways.
Barking or unusual cough
Its sound may guide examination of the upper airway, but a recording cannot replace clinical assessment.
Cough with wheeze
May suggest narrowed airways, but asthma and other causes require objective assessment rather than sound alone.
Common Causes in Adults
Post-infectious airway sensitivity
The original illness has settled, but an oversensitive cough reflex may continue for several weeks.
Asthma-related airway inflammation
Cough may occur with or without obvious wheeze and can vary with time, exercise or exposure.
Upper-airway disease
Nasal inflammation or sinus disease can accompany throat clearing, congestion, discharge and cough.
Reflux-related symptoms
Reflux may contribute when typical digestive or throat symptoms are present, but cough alone does not prove it.
Smoke and environmental exposure
Tobacco, vaping, indoor smoke, pollution, mould and workplace dust or fumes can irritate or damage airways.
Prescribed-treatment effect
Some long-term treatments can trigger cough. The clinician should review the complete list; do not stop anything independently.
Other Causes That Must Not Be Missed
- Tuberculosis or another persistent lung infection.
- Chronic obstructive lung disease or structurally widened, mucus-producing airways.
- Interstitial lung disease causing scarring or inflammation within the lungs.
- Lung or airway tumour, especially with blood, weight loss or significant exposure history.
- Heart disease or fluid congestion, particularly with breathlessness or swelling.
- Repeated aspiration from swallowing problems or reflux of material into the airway.
- An inhaled foreign body, which can present long after an unwitnessed choking episode.
These conditions are not the cause of most coughs, but the history and examination determine when they must be actively excluded.
Why Tuberculosis Is Considered
Pulmonary tuberculosis may cause persistent cough, sputum, blood, fever, night sweats, tiredness, reduced appetite or weight loss. Some people have less typical symptoms, and risk is higher after close contact or when immunity is reduced.
A Cough Duration Alone Cannot Confirm or Exclude Tuberculosis
The clinician considers symptoms, contact and exposure history, examination, chest imaging and appropriate sputum or molecular testing. Early diagnosis protects the patient and close contacts.
Chronic Cough in Children Is Different
Adult assumptions should not simply be applied to a child. Age, growth, feeding, cough quality, infection history, vaccination, exposures and the possibility of an inhaled object all change the pathway.
- A daily wet cough is clinically important and should not be dismissed as a habit.
- Sudden onset after choking raises concern for an inhaled foreign body.
- Cough during feeds may suggest swallowing dysfunction or aspiration.
- Poor growth, clubbing or recurrent pneumonia suggests an underlying disease needing further investigation.
- Chest X-ray and age-appropriate breathing tests are important parts of the initial pathway.
What Happens at the First Consultation?
Detailed history
The cough pattern, warning signs, exposures, previous illnesses and every current treatment are reviewed.
Physical examination
Breathing rate, oxygen level, chest sounds, nose, throat, heart, lymph nodes and fingers may be assessed.
Chest X-ray
Often part of adult chronic-cough assessment and important in children with a daily cough beyond four weeks.
Spirometry
A breathing test checks airflow and may be repeated after a clinician-administered intervention to assess reversibility.
What Other Tests May Be Selected?
Can the Chest X-ray Be Normal?
Yes. Asthma-related cough, upper-airway disease, reflux-associated symptoms, treatment-related cough and cough hypersensitivity may occur with a normal X-ray. Some early or subtle lung problems can also be missed on a plain image.
A normal result is reassuring in context, but it does not end the assessment when warning signs, abnormal examination or persistent unexplained symptoms remain.
Why a CT Scan Is Not Automatic
Detailed imaging can reveal findings that are important, incidental or unrelated to the cough. It also involves radiation. The decision is therefore based on the chest X-ray, examination, age, exposure history and specific clinical question rather than cough duration alone.
How Is Chronic Cough Managed?
Management targets the identified cause or “treatable trait”—for example, variable airway narrowing, nasal disease, reflux with typical symptoms, ongoing exposure, infection or aspiration. The plan, duration and follow-up are individualised.
- Review the response against a clear goal rather than continuing an ineffective plan indefinitely.
- Address smoke, vaping, occupational and indoor-air exposure with appropriate support.
- Check technique and adherence when a prescribed respiratory device is part of the plan.
- Investigate persistent wet cough or recurrent infection rather than only suppressing the reflex.
- Refer when warning signs, abnormal tests or unresolved symptoms require specialist investigation.
What Is Cough Hypersensitivity?
In some adults, the cough reflex remains unusually sensitive even after obvious causes have been assessed or treated. Talking, laughing, perfume, cold air or a minor throat sensation may trigger repeated coughing.
This is considered only after appropriate assessment. It is not a label for every unexplained cough, and the same terminology should not simply be applied to a child. Selected patients may benefit from specialist cough-control therapy and multidisciplinary care.
How Can Chronic Cough Affect Daily Life?
- Disturbed sleep, fatigue and poor concentration.
- Chest or abdominal muscle pain, headache or dizziness.
- Urine leakage during forceful coughing.
- Voice strain, retching or vomiting.
- Embarrassment, anxiety, social withdrawal or difficulty at work.
- Rarely, fainting or rib injury after severe coughing.
These effects are real and should be discussed. The severity of disruption matters even when initial tests are reassuring.
Common Myths
Frequently Asked Questions
When is a cough considered chronic?
Usually after eight weeks in an adult. In a child, a daily cough beyond four weeks needs a child-specific assessment.
Should I wait eight weeks before seeing a doctor?
No. Seek assessment earlier for blood, breathlessness, chest pain, fever, weight loss, night sweats, worsening illness, tuberculosis exposure or any concern in a child.
Does a dry cough mean allergy?
Not necessarily. Allergy is one possibility among post-infectious sensitivity, asthma-related inflammation, environmental irritation, reflux and treatment-related cough.
Does coloured sputum prove infection?
No. Colour can reflect airway inflammation and immune cells. Examination and selected testing determine whether an infection is present.
Can asthma cause cough without wheezing?
Yes. Some patients mainly cough, but the diagnosis should be supported by the clinical pattern and objective testing where possible.
Can nasal or sinus problems cause cough?
They can contribute, particularly with congestion, discharge, throat clearing or reduced smell. These symptoms guide whether ENT assessment is useful.
Can reflux cause cough without heartburn?
It is possible, but cough alone is not enough to prove reflux. The clinician looks for a consistent symptom pattern and avoids assuming it is the cause.
Why is the doctor reviewing all my regular treatments?
Some prescribed treatments can trigger cough or affect its investigation. Do not stop anything yourself; the prescriber will decide whether a supervised change is appropriate.
Does everyone need a chest X-ray?
It is commonly part of adult chronic-cough assessment and important in a child with a daily cough beyond four weeks, but urgency and additional testing are individualised.
Does everyone need a CT chest?
No. CT is chosen when the X-ray, examination or clinical question justifies more detail. It is not a routine first test for every cough.
When is sputum tested?
Testing may be selected for a productive cough, repeated infection, blood, tuberculosis risk or an abnormal chest finding.
Could a cough be tuberculosis?
Yes, particularly with exposure, fever, night sweats, weight loss, sputum or blood. Symptoms alone cannot diagnose it, so appropriate testing matters.
Why does my child’s cough need a different pathway?
Children have different common causes, smaller developing airways and age-specific warning signs. Feeding, growth and foreign-body history are particularly important.
What if all the initial tests are normal?
The clinician reviews treatable traits, exposure, upper-airway and reflux symptoms, cough hypersensitivity and whether specialist tests or monitored follow-up are needed.
When is higher-centre referral appropriate?
Referral may be needed for significant bleeding, abnormal imaging, suspected tumour or complex infection, interstitial lung disease, difficult bronchoscopy, severe paediatric disease or advanced testing beyond local capability.