I think that pyhorrhea is commonly known as gum disease. that, I blessedly, have never experienced. Flatulence, I have. completely diet related.
It's the eye thing that's got me too. I'm having trouble, not with close focus, but with distance. I'm working on it. computer-induced myopia, I've heard it called.
I'm only as good as those I've been blessed to know and learn from.