Where do stones form and lodge?

Some of the stones are formed due to infection. In the Kidney calyx they pass spontaneously or lodge else where in the urinary tract - stay and grow.

Some stones move to the Kidney pelvis and increase in size blocking the flow of urine, thus compromising Kidney function giving rise to pain, swelling and sometimes infection.

Stones which grow in the Kidney and occupy all its area form a staghorn calculus. They are of different types depending upon presence or absence of infection.

A stone if small (less than 7 mm) comes down further into the ureter, blocks the flow of urine, producing symptoms like pain, blood in urine, burning during urination.