What should you know about lung cancer from smoking?

Tobacco smoke contains substances that can injure cells lining the airways. Repeated injury can lead to abnormal cell changes and cancer. Risk is influenced by how long and how much a person smoked, exposure to second-hand smoke and other factors; it is not a moral judgement or a guarantee of what will happen.

Stopping smoking helps reduce further exposure and can improve breathing and general health, even after a diagnosis. A persistent cough, coughing blood, chest pain, breathlessness or a changing voice should be assessed rather than attributed automatically to smoking.

If you smoke, ask a clinician about a quit plan, nicotine replacement or prescription support, and ways to manage cravings. If lung cancer is suspected or diagnosed, evaluation may include scans, biopsy and tumour testing. Treatment can include surgery, radiotherapy, chemotherapy or palliative care, depending on the cancer and the person’s health.

Tell the care team about current smoking, previous attempts to stop, medicines and workplace exposures. This information can help them tailor support and manage treatment safely.

Get urgent medical help for severe breathing difficulty, coughing blood, sudden chest pain, fainting, new weakness or confusion. Arrange prompt clinical review for a cough or hoarse voice that persists, worsens or is accompanied by other concerning changes.

Could my symptoms have another cause? Which tests are appropriate? Would genomic tumour profiling affect treatment? What support is available to stop smoking, and can I start it during cancer treatment?