What are the warning symptoms and signs of cancers?

1. Indigestion or difficulty in swallowing or feeling full after eating only a small amount of food.
2. Thickening or lump in breast, scrotum or elsewhere in the body
3. A cough that persists; hoarseness or change in the voice; a cough that does not go away; blood in the sputum
4. A sore or ulcer that does not heal, increases in size, bleeds or becomes painful
5. Change in bowel or bladder frequency, change in color of stool, diarrhea or constipation; blood in urine or stools.
6. Unusual bleeding or discharge in urine or stools; discharge (particularly if blood stained) from any part of the body, e.g., nipples, urethra or vagina; bleeding after sexual intercourse, bleeding in between menstrual cycles.
7. A white or red patch in the mouth, lasting more than four weeks.
8. Obvious change in a wart or mole