You usually start by seeing your GP. They will ask you about your general health and symptoms and will also examine you. This might include listening to your breathing and seeing how much air you breathe in and out. Your doctor will then decide whether to do tests or refer you to a specialist.
Find out what happens when you see your GP and read about how to get the most out of your appointment.
Your GP should arrange for you to see a specialist if you have symptoms that could be due to lung cancer.
There is no national screening programme for lung cancer in the UK.
There are a number of different tests to diagnose lung cancer, and to find out the size of the cancer and whether it has spread. Find out more about these tests.
The NHS will be offering Lung Health Checks in some areas of England from Autumn 2019.