More and more people are going online to search for information about their health.
Though it can be a minefield, where unverified sources abound, searching the internet can help people to understand different health problems, and give them access to emotional and social support.
By using the internet, patients can prepare for appointments, or follow up on issues that were raised in the consulting room but left them with unanswered questions.
But not everyone is so keen on patients using the internet in this way.
Some doctors and other heath professionals have doubts about the quality and usefulness of the information available.