What are the symptoms of cancer?

In its early stages, cancer usually has no symptoms, but eventually a malignant tumour will grow large enough to be detected. As it continues to grow, it may press on nerves and produce pain, penetrate blood vessels and cause bleeding, or interfere with the function of a body organ or system.

The earlier a cancer is detected, the more likely it is that treatment will be successful. Understanding what symptoms and changes to your body to look out for could be important.