Physician · Greater Noida

Cough That Won't Go Away? Causes & When to See a Doctor

A cough lasting more than about 2–3 weeks should be checked. Common causes include post-viral airway sensitivity, allergies or asthma, acid reflux, post-nasal drip, and chest infections — and, in India, tuberculosis always needs to be considered. Dr. Manuj Sondhi, MRCP (UK), a Consultant Physician at Nirvana Clinic, Greater Noida, evaluates persistent cough properly rather than just repeating cough syrups.

📞 Book Consultation
See a doctor urgently if

When a Cough Needs Prompt Attention

⚠ Seek prompt medical care if your cough comes with:

  • Coughing up blood
  • Breathlessness or chest pain
  • High fever, or fever with night sweats and weight loss (possible TB)
  • A cough lasting more than 3 weeks that isn't improving
  • Severe difficulty breathing or blue lips — this is an emergency
Common Causes

Why a Cough Can Linger for Weeks

Most long-lasting coughs are not serious, but a few causes are important to rule out. A physician's job is to tell which is which rather than treating blindly.

Post-viral cough

After a cold or flu, the airways can stay irritated for weeks. This is common and usually settles — but should be reviewed if it drags on.

Asthma & allergy

Allergic or asthmatic airways cause a dry, often night-time or exercise-triggered cough that responds to specific treatment, not antibiotics.

Acid reflux (GERD)

Reflux is a frequently missed cause of chronic cough, often worse when lying down or after meals.

Post-nasal drip / sinusitis

Mucus dripping from the nose or sinuses into the throat is a very common trigger for a persistent cough.

Chest infection

Bronchitis or pneumonia can cause a productive cough with fever. An infection assessment may be needed.

Tuberculosis (TB)

In India, a cough beyond 2–3 weeks — especially with weight loss, fever or night sweats — must be tested for TB. This is important and treatable.

BP medicine side-effect

A class of blood-pressure medicines (ACE inhibitors) commonly causes a persistent dry cough. A medicine review can confirm this.

Smoking & airway disease

Smoking-related airway disease (COPD) is a cause of long-term cough that benefits from proper assessment.

How a Physician Helps

How Dr. Manuj Evaluates a Persistent Cough

1
Detailed historyDuration, dry vs productive, triggers, fever, reflux, smoking and current medicines — this narrows the cause quickly.
2
Examination & targeted testsChest examination, and where indicated a chest X-ray, TB testing or lung-function test — ordered for a clear reason, not routinely.
3
Cause-specific treatmentTreatment aimed at the actual cause — reflux, allergy, infection or medication change — rather than repeated cough syrups.
4
Safe follow-upA clear plan for when to review and what warning signs mean you should return sooner.
Physician in Greater Noida Fever doctor Infection specialist Hypertension (BP) Medicine review
Common Questions

Persistent Cough — FAQs

How long is a cough "too long"?
A cough lasting more than about 2–3 weeks, or one that keeps coming back, should be reviewed by a doctor. Most are not serious, but a few important causes need to be excluded.
When should I worry about TB?
In India, a cough lasting more than 2–3 weeks — especially with fever, night sweats, weight loss or coughing blood — should be tested for tuberculosis. TB is common and very treatable when diagnosed.
Can blood-pressure medicine cause a cough?
Yes. A class of BP medicines called ACE inhibitors commonly causes a persistent dry cough. If you started a new BP medicine before the cough began, a medicine review can check whether it is the cause.
Do I need a chest X-ray for a cough?
Not always. A chest X-ray or other test is ordered when the history or examination points to a reason for it — for example a long-lasting cough, fever, breathlessness or red-flag symptoms — rather than for every cough.
About the Physician

Consult Dr. Manuj Sondhi, MRCP (UK)

Dr. Manuj Sondhi (MBBS, MD, DNB, MRCP (UK), PGD in Clinical Endocrinology & Diabetes, Fellowship in Infectious Diseases & HIV from Tata Memorial Hospital) is a Consultant Physician & Diabetologist at Nirvana Clinic, Greater Noida, with 15+ years of experience and 17 peer-reviewed publications. See the full physician page →

Cough Not Settling? Get It Properly Assessed

Book a consultation with Dr. Manuj Sondhi at Nirvana Clinic, Sun Twilight Mall, opposite Delta 1 Metro Station, Greater Noida.

📞 Call Dr. Manuj 📍 Get Directions
Medical disclaimer: This page is for general education and does not replace professional medical advice, diagnosis or treatment. A persistent cough has many possible causes and only a qualified doctor can identify yours after assessment. Always consult a registered medical practitioner. If you have severe breathlessness, chest pain or are coughing blood, seek emergency care immediately.