Lung cancer symptoms: When is coughing up phlegm a sign? What to look for

If you are struggling to quit smoking, you call the NHS Smokefree helpline on 0300 123 1044, open Monday to Friday, 9am to 8pm and Saturday to Sunday, 11am to 4pm.

Some substances increase the risk of developing lung cancer.

“These include asbestos, silica, and diesel exhaust. People can be exposed to these through their work,” warns Cancer Research UK.

Other risk factors include:

• Air pollution
• Previous lung disease
• Exposure to radon gas
• Family history of lung cancer.