Go to the hospital for urology registration, drink water to hold your urine, and then check B-ultrasound, which can basically answer your question about "location (junction of renal calyx, renal pelvis and ureter), and take abdominal X-rays to assist diagnosis. Your B-ultrasound report will definitely be written.

As for the composition of the stone, it is more complicated to identify it. You need to pay attention to your urine in your life, and use a metal basin to discharge it every time. If pebbles are discharged, you will hear the obvious sound of pebbles hitting the metal basin, and then carefully collect pebbles. Most of them have to be taken to the local geological research institute or a place where jewelry can be identified. This method is the most accurate. Other methods to judge the composition of stones according to the chemical properties of your urine are indirect methods with great errors.

In addition, if the 0.8cm stone is in the upper pole of the kidney and has a regular shape, most of it can be discharged by itself. You need to drink more water and do more jumping exercises.