Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.These contrast with benign tumors, which do not spread to other parts of the body.Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss and a change in bowel movements.While these symptoms may indicate cancer, they may have other causes.Over 100 types of cancers affect humans.Many cancers can be prevented by not smoking, maintaining a healthy weight, not drinking too much alcohol, eating plenty of vegetables, fruits and whole grains, vaccination against certain infectious diseases,
- When cancer begins, it produces no symptoms.
- Change in bowel or bladder habits
- A sore throat that does not heal
- Unusual bleeding or discharge (for example, nipple secretions or a “sore” that will not heal that oozes material)
- Thickening or lump in the breast, testicles, or elsewhere
- Indigestion (usually chronic) or difficulty swallowing
- Obvious change in the size, color, shape, or thickness of a wart or mole
- Nagging cough or hoarseness
- unintentional loss of weight or loss of appetite
- A new type of pain in the bones or other parts of the body that may be steadily worsening, or come and go, but is unlike previous pains one has had before
- Persistent fatigue, nausea, or vomiting
- Unexplained low-grade fevers with may be either persistent or come and go
- Recurring infections which will not clear with usual treatment.