<s>[INST] I had kidney stone surgury on wed. The dr. placed a stent inside. I was ok on thursday and friday. Last night and this morning, I have has very bad pains. worse then when I had the stones. I caled the dr. and he said it was normal and it was pressure from the stent. I am peeing blood and i feel sick and the pain is getting worse. I am taking 2 oxycodone almost every 2 hours, thats how bad it hurts. The dr refuses to remove the stent until monday oct. 3rd. my question is, I have the string outside my penis, can I remove the stent myself. its been 4 days. Or will I do more damage? The dr. said the tube leading away from my kidney may swell shut. Im scared, but the pain is unbariable. please help. [/INST] Hi,Thanks for writing in.It is important to put a stent in the kidney after stone is removed to maintain clear passage of urine and drain out any small fragments of stone. Stents are thin long tubes with curves in both ends. One end is in the pelvis of the kidney and the other end is in the urinary bladder.If your bladder gets filled then the stent is clear and allowing urine to pass through. Stent can get displaced and cause injury to kidney pelvis or lower ureter and cause bleeding. An ultrasound scan is required to know if the stent is displaced or there is any urinary bladder infection or any other cause for passage of blood in urine. Stent is removed by the doctor and you should not do it yourself. Please do not worry. </s>