<s>[INST] left kidney have stone of 12 mm size found in ultrascan. Sir, please help me i have a stone of 12 mm since 1 month, in Left kidney which found after Ultrascan. My question can you please let me know the medicines on how to remove it easily with drinking enough water. I have pain only once or twice in month. Please needed help. Thanks for your help. Rahman [/INST] Hello, welcome to Chat Doctor. Your renal stones of size 12 mm are large enough making them unable to pass through ureters in urine. You should consult a surgeon for proper treatment for stone removal. For kidney stones that do not pass on their own, a procedure called lithography is often used. In this procedure, shock waves are used to break up a large stone into smaller pieces that can then pass through the urinary system. Surgical techniques can also be used for stone removal. Wish you good health. </s>