Thanks for writing in.
You have had right hydronephrosis
in 2009 which was treated by stenting I think. The reason for your hydronephrosis must be investigated.
Hydronephrosis can be caused by stones in kidney
, infection of kidney, any old surgery on kidney and ureter.
This may require further investigation by doing intravenous urography (IVU). After doing IVU the exact block can be studied with the cause.
Further treatment depends on the outcome of IVU. If there is surgical cause, a small operation will relieve the block.
You may please have consultation with a urologist
at a Government hospital (SSKM, Kolkata is good).
Hope this helps.