I don't know much. These are what I had read before:
Rectal Therapy with Prograf Helped Patients with Resistant UC, Study Shows
Patients with resistant ulcerative proctitis, a mild form of ulcerative colitis (UC), respond to therapy with rectal Prograf (tacrolimus) ointment, achieving clinical remission and mucosal healing, according to the results of a small clinical trial.
ibdnewstoday.com/2017/10/17/prograf-tacrolimus-rectal-therapy-resistant-ulcerative-proctitis/
The Clinical Trial
One of the newer medications is the immunosuppressing medication, tacrolimus that has been shown to be effective in UC when taken orally. Unfortunately, the oral use of this medication can have numerous serious side effects. In order to overcome these side effects, the use of topical rectal tacrolimus has been examined. Pilot studies in ulcerative proctitis (inflammation confined to the rectum) resistant to conventional therapies have demonstrated a clinical remission in 75% of patients and although the medication was well absorbed through the lining of the bowel, the levels in the blood were very low and no serious side effects were reported. The findings suggest that this preparation is indeed effective for inflammation in the distal bowel and that the method of administration reduces side effects. Further work, however, now needs to be undertaken to validate the original findings.
clinicaltrials.gov/ct2/show/NCT01418131
The Published Paper of That Trial
www.cghjournal.org/article/S1542-3565(17)30258-6/fulltext
You can search in the forums for more information. I don't know if this treatment is available to patients right now; but it seems worthy of searching about it.
Like yourself, I have been dealing with a very stubborn rectal inflammation (Crohn's) for a long time, and I am starting a new treatment for it: 6mp + Cimzia + rectal mesalazine. I've already been using max. dose of 6mp, and now adding Cimzia and rectal mesalazine. I'll see how well it's going to work in three to four months.
I find drinking bone broth soup helps with my rectal inflammation.
I have a question for you: Does eating fruits (fructose) increase your rectal bleeding? It does that to me.
Have you tried vitamin E enema? SCFA/butyrate enema?