I am skpetical of the diagnosis. Perioral dermatitis is much more common in women. Steroid creams can induce it in men, though, and one of the creams you are using is DesOwen, a mild steroid, but a steroid.
But I'm not sure the bumps are pimples at all. Maybe they once were, and have left behind redness which is best ignored and left to fade on its own. Certainly, all the lengthy and aggressive treatment you've used hasn't done the job.
Chewing food makes redness redder just by increasing blood flow to the skin nearby. These fluctuations are not important.
Changing soaps and toothpastes rarely helps, in my experience. I am skeptical as well of the validity of the "link" with sodium lauryl sulfate, certainly as it pertains to Cetaphil which in this context is innocuous though unhelpful.
"Could it even be that I simply need to stop topical treatment all together?" you ask.
Indeed it could. I see little to lose. Ask your doctor.
Best.
Dr. Rockoff
After being told the topical steroid I was using should be stopped, another M.d. gave me a scipt for doxy cyclene. The antibiotic did clear up the iritation, but now it is less effective, and I am hesitent to always be on antibiotics.
I stopped using them after my last refill was done because they are not working for me any more anyway.
I have tried another topical cream, but my skin is dry, peeling, and sore especially around my upper lip.
I am increasingly frustrated and my face literally hurts. What now?