3) Pain symptoms
Pain is also a very common symptom in bladder cancer and other types of cancer. It happens for different reasons. One of them is that inflammation and irritation of the tissue releases inflammatory cytokines that reach nerve terminals and stimulate them to send pain signals to the brain.
Another cause of pain is related to tumor growth. When the tissue expands, it is more likely to stimulate pain receptors, similar to what happens in case of swelling and inflammation. Pain in bladder cancer is felt in the lower abdomen, but it can also be felt in other parts of the abdomen.