I've Had Colorectal Cancer With Radiation Chemo And Surgery. My

I've had colorectal cancer with radiation chemo and surgery. My bowels don't seem to work just right but the debilitating pain comes from my rectum. I can help relieve the pain with hot and/or cold.
Someone has mentioned there may be nerves in the rectum that became severed or damaged, and that pain is a little harder to heal than other soft tissue.