Cough is one of the most common respiratory symptoms. It is a protective reflex that helps clear mucus, infection, or irritants from the airways. In many cases, cough improves within a few days. However, when it becomes persistent or recurrent, it may indicate an underlying lung condition that needs proper evaluation.
Common Causes of Cough
A short-term cough is usually caused by:
- Common cold or flu
- Viral respiratory infections
- Allergies
- Post-nasal drip
- Smoke or pollution exposure
These causes typically improve within 1–2 weeks.
A cough lasting more than three weeks is considered chronic. Common medical causes include:
- Asthma
- Chronic bronchitis
- Acid reflux (GERD)
- Smoking-related lung disease
- Tuberculosis
Less Common but Important Causes
Persistent cough may sometimes be linked to more serious conditions, such as:
- Lung fibrosis (interstitial lung disease) – scarring of lung tissue
- Sarcoidosis – inflammatory disease affecting the lungs
- Pleural effusion – fluid collection around the lungs
- Autoimmune-related lung involvement
- Lung nodules or tumors
Although less common, these conditions require early diagnosis to prevent progression.
Warning Signs You Should Not Ignore
Seek medical evaluation if your cough is associated with:
- Shortness of breath
- Chest pain
- Wheezing
- Thick, green, or foul-smelling sputum
- Coughing up blood
- Unexplained weight loss
- Fever lasting more than a few days
Dry vs. Wet Cough
A dry cough usually indicates airway irritation, asthma, or early lung fibrosis.
A wet cough produces mucus and may suggest infection or chronic airway inflammation.
When to See a Pulmonologist
If your cough lasts more than three weeks, keeps returning, disturbs your sleep, or does not improve with treatment, a consultation with a pulmonologist (chest physician) is recommended. Early diagnosis ensures targeted treatment and protects long-term lung health.
For appointments and details please contact us at +923018479066, or email us at connect@thechestclinic.pk