What counts as a "persistent" cough?
Doctors classify cough by how long it has lasted:
- Acute cough — under 3 weeks. Usually viral. Self-limiting.
- Sub-acute cough — 3 to 8 weeks. Often post-infectious, lingering after a flu or bronchitis.
- Chronic cough — more than 8 weeks. Needs investigation. Do not ignore.
If your cough has crossed the 3-week mark — especially with weight loss, night sweats, blood-tinged sputum or breathlessness — book a chest evaluation. The earlier the cause is identified, the simpler the treatment.
The 7 most common causes we see in Bharuch
- Post-infectious cough — after viral fever, COVID, or flu. Airways stay sensitive for weeks.
- Asthma — often presents as a dry, night-time cough without obvious wheeze. Common in Bharuch's humid + dusty environment.
- Tuberculosis (TB) — any cough over 2 weeks in India should be screened for TB. A sputum test and chest X-ray are quick, cheap and decisive.
- Acid reflux (GERD) — silent reflux at night irritates the throat and triggers cough.
- Post-nasal drip / sinusitis — mucus trickling down the throat, worse on lying down.
- Chronic bronchitis / COPD — common in smokers, ex-smokers, and people with long-term smoke exposure.
- Medication side-effect — ACE-inhibitors used for blood pressure cause a dry cough in 10–15% of patients.
A short chest consultation, a clear X-ray and a basic sputum test usually pin down the cause the same day.
Red-flag signs — see a doctor the same day
- Coughing up blood, even a streak
- Breathlessness at rest or on mild exertion
- Chest pain with cough
- Unexplained weight loss or night sweats
- High fever beyond 5 days
- A long-time smoker with a changing cough pattern
These need urgent evaluation — not a longer trial of antibiotics or syrup.
What a chest evaluation looks like
At our Bharuch clinic, a first visit for chronic cough typically includes:
- A focused chest history — duration, triggers, sputum colour, smoke exposure, family TB contact
- Examination with stethoscope and oxygen-saturation check
- A sputum test if TB or infection is suspected
- A chest X-ray — read on the spot
- Sometimes a spirometry / PFT if asthma or COPD is on the table
Most patients walk out the same visit with a clear diagnosis and a treatment plan, not a long list of referrals.
What you can safely try at home (for under-3-week coughs)
- Warm fluids, honey + ginger, and steam inhalation
- Avoid smoke, dust and strong perfumes
- Sleep with the head slightly raised if reflux is suspected
- Saline nasal spray for post-nasal drip
If symptoms aren't better in 7–10 days, or if any red-flag sign appears, stop self-medicating and get evaluated.
Frequently Asked Questions
How long is too long for a cough?
More than 3 weeks of continuous cough is no longer normal. More than 8 weeks is classified as chronic cough and always needs a chest evaluation.
Is every long cough TB?
No, but in India any cough lasting more than 2 weeks should be screened for TB with a sputum test and chest X-ray. Most turn out to be asthma, reflux or post-viral — but ruling out TB is essential.
Can asthma cause cough without wheezing?
Yes. This is called cough-variant asthma. The only symptom may be a dry, night-time cough that worsens with cold air, exercise or allergens.
Will antibiotics cure a chronic cough?
Usually not. Most chronic coughs are not bacterial. Repeat antibiotic courses without a diagnosis delay correct treatment and add side-effects.
How is cough evaluated at Samarth Chest Hospital?
A focused chest examination, a chest X-ray read on the spot, a sputum test if needed, and spirometry when asthma or COPD is suspected — usually completed in a single visit.