Radiation treatment for lung cancer: what to know

Radiotherapy may be aimed at a tumour in the lung, nearby lymph nodes, or an area where lung cancer has spread. The purpose can be to treat cancer in one focused area, reduce the chance of local return after another treatment, or ease symptoms such as pain, bleeding, breathlessness, or pressure. The plan depends on tumour position, cancer type and stage, previous treatment, and your general health.

Before treatment, imaging helps the team map the target and organs nearby. You may have a custom position or mould so each session matches the plan. Treatment is usually delivered over a planned series of visits, although some situations use a shorter course. The beams do not make you radioactive.

Keep the oncology team informed about medicines, implanted devices, pregnancy, lung conditions, and previous radiation. Attend planning appointments and follow positioning instructions. Fatigue and skin irritation in the treated area can develop during or after a course; some people also develop cough, sore throat, or discomfort when swallowing if nearby tissues receive radiation. Ask before applying creams to treated skin, and pace activity with rest, fluids, and nourishing meals.

Your wider plan may include surgery, chemotherapy, genomic tumour profiling, or supportive care. Read about [Radiotherapy](/treatments/radiation-oncology/radiotherapy/) and [Lung Cancer](/conditions/lung-cancer/) to understand related options.

Contact your care team promptly for worsening breathlessness, chest pain, a new fever, coughing blood, inability to swallow fluids, or symptoms that interfere with eating or drinking. Seek emergency help for severe breathing difficulty, sudden confusion, fainting, or blue lips. A new or persistent hoarse voice also deserves assessment; it is not proof of cancer, but can have several causes.

Ask what the treatment is intended to achieve, which area will be treated, how many visits are planned, and whether chemotherapy or surgery is part of the overall approach. Ask how your breathing and swallowing will be monitored, which symptoms should be reported the same day, and whether [Palliative Care](/treatments/supportive-and-palliative-care/palliative-care/) could help with comfort alongside cancer treatment.