What is a Chronic Cough?
Most coughs improve within a few days or weeks. However, a cough is considered chronic if it lasts:
- More than 8 weeks in adults
- More than 4 weeks in children
it is considered a chronic cough.
A chronic cough can affect your sleep, work, daily activities, and overall quality of life. More importantly, it may be a sign of an underlying medical condition that requires further evaluation and treatment.
Common Causes of Chronic Cough
1. Upper Airway Cough Syndrome (Post-Nasal Drip)
This occurs when mucus from the nose or sinuses drips down the back of the throat, causing irritation and triggering a cough.
Common symptoms
- Frequent throat clearing
- Feeling of mucus in the throat
- Runny or blocked nose
- Sore throat
2. Gastroesophageal Reflux Disease (GERD)
GERD occurs when stomach acid flows back into the oesophagus and throat, irritating the airways.
Common symptoms:
- Heartburn
- Sour taste in the mouth
- Bloating
- Difficulty swallowing
- Persistent dry cough
Symptoms often worsen after large meals or when lying down.
3. Asthma
Asthma causes inflammation and narrowing of the airways.
Common symptoms:
- Wheezing
- Shortness of breath
- Chest tightness
- Cough that worsens at night or during exercise
Some patients may only experience a persistent cough without obvious wheezing.
4. Smoking
Smoking irritates the airways and damages the lungs over time.
Common symptoms:
- Persistent cough
- Excess mucus production
- Wheezing
- Shortness of breath
Long-term smoking increases the risk of chronic bronchitis, chronic obstructive pulmonary disease (COPD), and lung cancer.
5. Chronic Bronchitis
Chronic bronchitis causes ongoing inflammation of the airways and excessive mucus production.
Common symptoms:
- Daily cough with mucus
- Breathlessness
- Wheezing
- Fatigue
Early diagnosis and treatment can help prevent disease progression.
6. Medication-Related Cough
Certain medications can trigger a chronic cough.
One common example is ACE inhibitors, a type of medication used to treat high blood pressure.
The cough is usually:
- Dry
- Persistent
- Worse at night
Symptoms often improve after changing medication under a doctor's advise.
7. Post-Infectious Cough
Sometimes a cough continues even after recovering from a viral infection such as the flu or a cold.
This happens because the airways remain sensitive and irritated for several weeks.
Fortunately, most post-infectious coughs gradually improve with time.
These symptoms may indicate more serious conditions such as lung infections, lung fibrosis, or lung cancer.
Take Chronic Cough Seriously
A chronic cough is more than just a nuisance - it may be a sign of an underlying health problem.
Identifying the cause early can lead to more effective treatment, better symptom control, and improved quality of life.
If your cough has persisted for several weeks, consult a healthcare professional for proper evaluation and treatment.
Article by Dr. Narisa Binti Sulaiman Sahari Internal Medicine & Rheumatology Consultant
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