Based from the information provided you have undergone the process of stent
placement and stent removal so that the stone can pass from the narrow tube known as URETER
1) YES - the pain is normally felt at the sight of instrumentation and the pain in the lower area of kidney
is a referred pain
and it occurs in such cases of kidney stone.
2) These is a minor operative process will usually take about 10 days from the closure and removal of the stent to heal completely provided the healing was with out any complication.
Hope this answer may fulfill you need.
Dr. JAY PATEL.