I've heard that bunion removal sometimes is actually worse pain than before the removal. What I would have you do is utilize as wide a toe box as is comfortable. Pad the bunion with moleskin, compeed, or Second Skin to act as a buffer betweent he bunion and your shoe and utilize foot orthotics to support your mid-foot so that the bunion is not aggravated as you go from foot flat to toe off. I personally am hesitant to offer a bunionectomy to runners. The amount of time between surgery and return to running may be as long as four months to a year.
Many runners are unhappy with the residual stiffness of the big toe joint.
So, unless you're having severe problems, I would not rush to undergo a surgical procedures such as this. There's always exceptions. I have muscular contractions and pain in my upper back which I believe is a result of the weight I've put on. When I try to run, it seems to aggravate the pain in my upper back muscles, to the point that it keeps me awake at night. Again, basically you have to find out the cause of your underlying back pain.