There are several symptoms that may indicate cancer in the body. Losing weight without being on a diet or being physically active can be associated with thyroid cancer or stomach cancer. If you constantly have fever it can be a sign of leukemia or lymphatic cancer. Frequent headaches can be a symptom of brain cancer, back pain can indicate of cancer of the rectum, or ovary cancer. Regular cough can be a symptom of lung or throat cancer. Coughing up blood may be due to cancer of the lung, blood in the stool indicates you may have cancer of the colon and rectum, blood in the urine means you might be dealing with bladder cancer, vaginal bleeding is linked to cancer of the cervix, and blood on the nipples may be due to breast cancer. If you urinate more often or less often than usual it can be a sign of cancer of the bladder or prostate, and frequent diarrhea or constipation can be a sign of colon cancer. If you notice any changes in the skin, mole or wart it can be signs of skin cancer. Wounds that do not heal and constant fatigue can also indicate to cancer.
All these changes are not always indicating of cancer, but if you notice some and feel suspicious about them you should definitely visit a doctor.