Cough That Will Not Settle — Causes & Tests, Rewari

Almost everyone coughs after a cold, and almost everyone stops within two weeks. A cough that is still there at three weeks is a different thing: it has stopped being the tail end of an infection and become a symptom that needs a reason. The commonest mistake — and the reason people arrive at a chest clinic having coughed for months — is treating it with one more course of antibiotics and one more bottle of syrup instead of asking what is causing it.

How long is too long

Doctors divide cough by duration, because duration tells you where to look.

Under 3 weeks (acute). Usually a viral infection. It settles on its own.
3 to 8 weeks (subacute). Often the airway is still irritable after an infection. Many of these settle, but some do not.
Over 8 weeks (chronic). This needs investigating properly. It will not simply wear off.

If you have been coughing for more than three weeks, the question is no longer "which syrup" but "why".

What usually causes it

In a chest clinic in this part of Haryana, a persistent cough most often turns out to be one of a handful of things.

Asthma, including the kind with no wheeze. Some people with asthma never wheeze — their only symptom is a dry cough, worse at night, after exercise or in cold air. This is called cough-variant asthma and it is commonly missed for years. Spirometry usually settles it.

Post-infectious airway irritability. After a viral chest infection the airway lining can stay inflamed and twitchy for six to eight weeks. The cough is dry, triggered by cold air, smells and talking. It does get better, and it does not need antibiotics.

Tuberculosis. TB remains common in India and a cough of more than two to three weeks is its classic presentation, particularly alongside weight loss, evening fever or night sweats. It is simple to test for and entirely curable — and dangerous to leave.

Acid reflux. Stomach acid rising into the throat irritates the airway and causes cough without necessarily causing heartburn. It is a frequent cause of chronic cough and a frequently missed one.

Post-nasal drip and allergy. Mucus running from the back of the nose keeps the throat irritated. If your cough comes with sneezing, a blocked nose or itchy eyes, allergy testing often explains it.

Smoking and COPD. A persistent morning cough with phlegm in a smoker or ex-smoker is not "just smoker's cough" — it is usually early COPD, and it is worth catching early.

Dust and fumes at work. Rewari and Dharuhera have a great deal of industrial and construction dust. An occupational exposure that matches the pattern of the cough is always worth asking about.

Blood pressure tablets. ACE inhibitors — drugs ending in -pril, such as ramipril or enalapril — cause a dry persistent cough in a noticeable minority of people who take them. It can begin months after starting. Never stop a heart or blood-pressure tablet on your own, but do mention it.

What happens at the consultation

The history does most of the work. When it started, whether it is dry or productive, what time of day it is worst, what sets it off, whether anything has changed at home or at work, what medicines you take, and whether you have lost weight — these narrow the possibilities before any test.

Then, depending on what that suggests:

A chest X-ray to look for infection, TB or anything structural.
Spirometry, a breathing test, to show whether the airways narrow and whether that narrowing reverses with an inhaler. This is how asthma and COPD are confirmed rather than guessed.
Sputum testing, including rapid molecular testing where TB is a possibility.
Allergy testing where the pattern points to allergy.
A CT scan or bronchoscopy only where the X-ray or the story calls for it — not routinely.

What to bring

Bring every prescription you have already been given, any chest X-ray films and reports, and a list of your current medicines including blood-pressure tablets. If a previous X-ray exists, bring it: a comparison over time is often more informative than a single new picture.

The point

A cough is a symptom, not a diagnosis. Most causes of a long-standing cough are straightforward and treatable once they are named. The aim of the consultation is to name it.

Frequently asked questions

How long should a cough last before I see a specialist?

Three weeks is the point at which a cough stops being an ordinary post-viral cough and deserves a proper look. Go sooner — the same week — if you are coughing blood, losing weight, feverish for more than a week, or breathless.

I have had four courses of antibiotics and the cough is still there. Why?

Because most long-standing coughs are not bacterial infections. Asthma, reflux, allergy, post-nasal drip and post-viral airway irritability do not respond to antibiotics at all. Repeating them will not help and makes resistance more likely.

My cough is dry and worst at night. Does that mean anything?

It is a recognisable pattern, and asthma is the usual explanation — including in people who have never wheezed. Spirometry before and after an inhaler usually answers it in one visit.

Could it be TB even though I feel reasonably well?

Yes. TB can present with a cough and very little else early on. It is easy to test for and fully curable, which is exactly why a cough over two to three weeks should be checked rather than assumed.

Do I need a CT scan?

Usually not. A chest X-ray and a breathing test answer most persistent coughs. A CT is useful when those raise a specific question, and ordering one first often adds radiation and cost without adding an answer.

A cough that will not settle