It is not infectious like a cold or the flu. Most cancers seem to be caused by our lifestyle habits and recreation or by substances in our environment that affect our bodies. Major causes of cancer are thought to include smoking, sun exposure, poor diet, chemicals and asbestos. Cancer-causing substances are called carcinogens. Cancer can affect all body parts except the hair, nails and teeth.
Cancer is more common in some parts of the body than others e.g. skin, lung, bowel and breast.
The blood can also be affected by cancer. Cancer of the blood is called leukaemia. By avoiding unnecessary exposure to the sun. By eating plenty of fresh seasonal fruit and vegetables. By cutting down on fatty, greasy foods.