Drinking lemon water worked.
I had a 4mm stone in my kidney (discovered on CT after passing a 3mm stone) and did a bunch of research on how to get it to pass. I stumbled upon some articles that said drinking a lot of lemon water (squeezing fresh lemon juice into water) can help reduce the size of the stone. Well, I went crazy with it and drank a TON of lemon water. I just went in for a 6 month follow up (ultrasound) and they said my stone is gone! I felt like I was passing what might’ve been tiny stones in the months leading up to my follow up, and I’m convinced that the lemon water truly worked in making my urine more acidic and naturally breaking up the stone.