Objectively, was this in the United States? Your English is off a bit, which makes me wonder where you were. Likewise, I don't know of any EM doc that would do "trigger point injections". After all, when you say "trigger point", I think of "fibromyalgia", which is also known as "depression".
This is notwithstanding your EM-doc bashing. How do you fix sodium? Simply, with normal saline, or water restrict. More deeply, look for the underlying cause. Administering the saline can happen in the ED, but most patients won't be in the ED long enough to show a difference about water restriction. Likewise, screwing with sodium is an inpatient thing. Have at it, brilliant guy!
Oh, and, likewise, Mr. Brilliant Doctor, if your wife was having "just regular muscle pain", why did you waste time and space (and money) coming to the ED? You couldn't treat her yourself with Tylenol (or would you give your wife Motrin? Then, I would run away from you!)?