I can tell you a bit about the pain, although mine is in different location from his. Mine was once at my tailbone, (three years ago), a constant pain which was most noticeable when I sat on a hard chair. I believe it was a tumor, a collection of growing cancer cells, that had attached to the tailbone at the very tip. There was a similar pain in my rectum, at the spot where I had a prostate biopsy about four years prior.i discovered that if I ate some tomato such as ragu or tomato soup, the pains subsided about 20 minutes after eating, for five or six hours. It happened at the same time I began Lupron therapy, and after about two months on Lupron and taking tomato every six hours, it eventually disappeared and is gone to this day. So later, similar pains occurred in my back, apparently at lymph nodes or in the lymph system.
I have been reducing the pain for them similarly, although now they seem to grow much faster than the first ones. The pain subsides 20 minutes after I drink V8 juice (or other lycopene-rich food) with vegetable oil, for about two hours now. i have increased the frequency as it seems necessary to control the pain. To me, the pain seems to be caused when the tumors grow large enough to press on nerves in the area. The V8 or ragu or tomato soup seems to cause my body immune system t-cells to attack the tumors, and they stop growing temporarily.
It's not necessarily something that everyone can do with success. Everyone has a different immune system and mine works better with lycopenes, although only while the lycopenes are in my small intestine. I have to admit it is difficult to get people to eat when they are sick or in pain, so that may be another problem. All I can say is it works for me.