Although there are many causes leading to hydronephrosis in patients, most hydronephrosis is related to stones, meaning that hydronephrosis occurs in patients due to ureteral kidney stones. Therefore, dietary restrictions are necessary for patients with hydronephrosis in daily life.

If the hydronephrosis is caused by calcium oxalate stones, patients should avoid consuming foods that are high in calcium and oxalates, such as nuts, legumes, spinach, and beets. If the hydronephrosis is due to the formation of uric acid stones, patients should also avoid consuming excessive amounts of animal organs, such as pork liver and kidneys, avoid seafood, and try not to drink beer, as these contain a high amount of purines, which can easily lead to stone formation. Additionally, if patients with hydronephrosis also have renal insufficiency, they should follow a low-salt diet and avoid consuming particularly salty foods, including various pickles, etc.