Diverticulitis is not really hereditary. It is really quite common amongst the elderly due to the aging of the bowel which allows the diverticuli to develop. DH dealt with one of the main experts around and he was told that it may or may not have a hereditary component, they still do not fully know why it develops and are, of course, completely baffled as to why it occured so badly in someone as young as he was.

hope it is something that is easily fixed for you.