Lung Cancer

Cancer that starts in the lungs. Smoking is the biggest cause, but non-smokers can also get it.

CancerLast updated: 21 October 2026

Quick Summary

Primary Symptoms

A cough that doesn't go away, coughing blood, breathlessness, chest pain, weight loss and tiredness.

Common Treatments

Surgery, radiotherapy, chemotherapy, targeted therapy and immunotherapy.

Risk Factors

Smoking, second-hand smoke, air pollution, indoor smoke, radon and workplace exposures like asbestos.

OverviewSymptomsCausesTreatmentFAQ

Overview

Lung cancer is a leading cause of cancer death. In India, it's often first mistaken for TB, which can delay diagnosis.

Stopping smoking at any age lowers risk.

Symptoms

Persistent cough

Or a change in a long-standing cough.

Coughing blood

Needs prompt checking.

Breathlessness

And chest pain.

Weight loss

And tiredness.

Causes & Risk Factors

Biological Causes

DNA damage in lung cells, mostly from tobacco smoke.

Key Risk Factors

  • Smoking Including bidis.
  • Pollution Outdoor and indoor smoke.
  • Workplace Asbestos and other chemicals.

Management & Treatment

01. Surgery

For early-stage cancer.

02. Chemo- and radiotherapy

Common treatments.

03. Targeted and immunotherapy

For specific types.

Frequently Asked Questions

Can non-smokers get lung cancer?
Yes.
How is it diagnosed?
With chest imaging and a biopsy.

Sources and further reading

Last updated 21 October 2026. For more detail, see these trusted health organisations.