Your GP will ask you about your symptoms including what they are, when you get them, and what makes them better or worse. They will also examine you.
Your doctor might arrange tests, or referral to a specialist.
How to get the most out of your GP appointment.
These photos give you an idea of what possible mouth cancers can look like, but remember that they might appear differently to this.
Find out when GPs refer people to see a mouth and oropharyngeal cancer specialist.
Find out what screening is, and why there is no national screening programme for mouth and oropharyngeal cancer.
Your doctor will ask about your symptoms and they might examine you. Most people will have a biopsy to diagnose mouth or oropharyngeal cancer.
The stage of a cancer tells you how big it is and whether it has spread.