<s>[INST] my  8 years old son have kidney problem, he said that regularly pain in stomach. general doctor said that may be water in kidney. i want to full check up about the diseases. where i go for good treatment in low cost because i am from poor family. advise  Rajiv from Jamshedpur [/INST] Yes. Pain abdomen in 8 year child may be due to hydroneprosis which, in lay man words is called water in kidney. There are various causes for hydroneprosis. Better to get a renal ultrasound which will tell1.  if there's is hydroneprosis or no 2.cause for hydroneprosis, like Stone, puj obstruction etc3 . status of kidney, the size and vascularityFurther things to be advised after scan report  Hope this helps. </s>