3. Change in bowel or bladder habits
If you experience long-term constipation, diarrhea or a change in the size of the stool, it may be a good idea to visit a doctor. These are signs of colon cancer. Symptoms of bladder or prostate cancer include pain when passing urine, blood in the urine or a change in bladder function.
Report these types of unusual signs to a doctor, however, keep in mind these could also be a signal of a urinary tract infection.