I'm not saying that your theory about the cause of your pain going away with stopping the diuretic is wrong. However, I would guess that a more likely explanation was that the diuretic was depleting your body of potassium which sometimes occurs with a majority of such drugs. Muscles don't like low potassium levels (hypokalemia). They ache and when the potassium reduction is severe, can even break down (rhabdomyolysis). I saw a young woman in the ER complaining of severe total body pain. She'd been taking an herb treatment for several months to lose weight. Her labs demonstrated severe hypokalemia and rhabdo. When I called Poison Control, I discovered that this herb contained a "natural" ingredient very much like hydrochlorothiazide (perhaps the diuretic YOU were taking?).
I repleted her potassium and put her on a low herb diet.
Again though, your theory is not a terrible one.
I have no doubt that with being 2 quarts low on water every day, I lost essential minerals, too. The knee pain was getting really bad, but after 3 days of not taking the diuretic, 90% of the pain was gone. I could not find any information on this in the scientific literature. There were only references to "gouty" arthritis...
The thing is my minerals were 'normal' according to my labs....
Then your theory (or possibly some other explanation) may be more likely to have validity. Low potassium should have been readily apparent by routine labs prior to stopping the diuretic. I mentioned it because myalgias are a common problem with diuretics and this is the usual cause. Doesn't mean it's the only cause.
Were you taking a thiazide diuretic? Thiazide diuretics have a tendency to reduce potassium and magnesium levels. Low magnesium and potassium are both associated with joint pain. If you have to go back on the diuretics and the pain comes back, try supplementing with magnesium. Be careful supplementing with potassium. Better to eat high-potassium foods.
Probably, lack of fluids did not cause you to have arthritis.
Because all those obese people got that way from avoiding a calorie surplus, right?
Some super low % of the population is gluten insensitive or has celiacs.
This is the simplest explanation for all the big asses waddling around: Discrepancy between self-reported and actual caloric intake and exercise in obese subjects. - PubMed - NCBI