A.C.
I've heard that some people's diverticulitis is caused by the H. Pylori virus. My dad has suffered from diverticulitis for most of his adult life. A couple years ago, his new doctor (from India), discovered he had H. Pylori. My dad went through treatment, and while his diverticulitis isn't totally gone, it is much, much better.
Some people are also allergic and/or have food intolerances--which I think is what your husband's doctor is trying to find out through having him do a bland diet (also, the bland diet will help heal his inflammed bowel). However, if he has Celiac disease and/or Gluten Intolerance, avoiding grains is good, but more importantly, it's the type of grains he's avoiding that make a difference (gluten/Celiac shouldn't have wheat (farro, semolina, durum, spelt, einkorn or any other type of "ancient" wheat grain), rye, or barley).
Before opting for surgery, I would seriously look into other treatment modalities. I strongly believe many things can be healed without resorting to surgery--if you find the "right" doctor who can help you.
I am at a loss as to why the doctor would state no veges. The fruit--acidic fruit I would stay away from, unless he's concerned about fruit causing diarrhea. Maybe the veges are too much for his damaged colon to digest? Then what is your husband getting for fiber? Is he taking extra fiber so that his colon stays healthy?
I am a BIG proponent of alternative healthcare. I didn't have any luck with my health problems in the allopathic community; I had to go alternative before I found help and answers to my health woes. I would suggest your husband go to see a naturopathic doctor and talk to them about his diverticulitis and have them test him for food allergies and intolerances. The naturopathic doctor would also have other ideas as to what might be causing the diverticulitis.
It is a known idea in the alternative healthcare community that a huge part of colon problems has to do with the food we eat (organic or processed?), the toxins we take in (heavy metals, chemicals, pesticides, pharma drugs), and the overall health state of our bodies (can the body detox and cleanse itself, or is it too full of crud to effectively cleanse?).
I have never been healthier or happier than I am now, four years after I started doctoring with alternative healthcare. I am SO GLAD I made that leap of faith, because I have found the problems for my body dis-eases and have taken steps to correct them.
Good luck to your husband.