My GP, when I visited the next morning, immediately suspected a renal calculus, more commonly called a kidney stone.

There was a large renal calculus (stone) that obstructed the calyces of the lower pole of this kidney, leading to a focal hydronephrosis (dilation of the collecting system).

Walnut: to eat two to four, can have a health kidney functions such as blood, can also auxiliary treatment kidney stones and urinary calculus, and to slow the aging.