<s>[INST] hi...My mothere has a kidney problem doctor said that there is a blockage in a tube which passes the urine Comes out of kidney and also said that there is also a stone at the end of that tube which do not allow urine to pass through. What should i do know please tell me...??? [/INST] Good Day, and thank you for being with Chat Doctor ! It will all depend on the size and location of the kidney stones. If it is smaller than 4 mm then your mother can pass out the stone spontaneously with intake of 2 liters of fluid every day and alpha-blockers (e.g. tamsulosin alfusozin). Stones less than 4 mm in size has an 80-90% chance of spontaneous passage. If the stones are bigger than options would include ESL (shockwave therapy) to fragment kidney stones and Ureteroscopy (inserting a small scope in the opening of the urine to remove the stone). A CT SONOGRAM would be needed to see the stone sizes and location to determine the next course of action. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://www.ChatDoctor .com/doctors/ Chat Doctor.  Best wishes. </s>