When doctor says you to change the way of living you need to make it. You need to understand that this will help you. Also, ask doctor for the detailed info and change the lifestyle. You need to change those thing that you have told the doctor. Less training and more healthy food. You need also have a positive thinking. It sounds ridiculous, but good thoughts can change everything for better. The way you live influences your health, and the way you think is the thing that makes you feel healthy and so on. I hope that you understand that and everything will be ok!
I know some information. People who are at a higher risk of developing uric acid stones should avoid foods that are high in purines, such as sardines. A high intake of purine increases the amount of uric acid in the urine and can lead to uric acid stones. According to the American Urological Association, high intake of purine from animal protein, particularly from fish, can lead to hyperuricemia and hyperuricosuria in healthy individuals without stones. Furthermore, purine-rich foods may trigger calcium-oxalate stones, because they increase the amount of calcium excreted in urine.
Yeah, it is really sad visit to doctor, but you shouldn't be worry so much, because you will have the long life in the future. When I was about 9-12 years old, I was also diagnosed with similar problem, but there were not small stones, but sand formation. The best way out of it, is healthy nutrition, quitting bad habits, and attending GYM!
Well, I didn't have such problems with my kidneys and I don't know what you should avoid eating, but my brother had the same experience as you. The reason of the stones in his kidneys was water which contained a high concentration of sand. So I can advise you to find out what was the reason of your sickness and first of all try to find out the concentration of sand in the water you drink.
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