Final answer:
The source of GU pain: inflammation is most severe when it involves the walls of a GU organ. Tumors in the GU tract can cause pain depending on their location and size.
Step-by-step explanation:
The source of GU pain: inflammation is most severe when it involves the walls of a GU organ.
Tumors in the GU tract can cause pain depending on their location and size.
For example, if a tumor is pressing against surrounding tissues or blocking urine flow, it can result in pain.
Additionally, tumors can cause inflammation and irritation to the surrounding tissues, leading to pain.