Frequent urination after urolithiasis surgery is the bladder or urethra stimulation performance, the possible causes are: surgical instrument stimulation, lithotripsy stimulation, co-infection and so on. 1. Surgical instrument stimulation: urinary tract stones are usually crushed or extracted under ureteroscopy, which inevitably produces friction stimulation to the bladder or urethra, causing temporary congestion and edema of the bladder or urethral mucosa, which leads to symptoms of urinary irritation such as frequent urination and urgency, and the symptoms can be relieved by themselves after the edema is absorbed. 2. Stone stimulation: urinary stone surgery will form small stones or debris, most of which will be excreted with the urine, but there will inevitably be a small residue in the bladder, which in turn produces irritation of the bladder caused by symptoms, the condition of the postoperative condition allows should drink more water and urinate more, to promote the discharge of the stone. 3. Combined infection: urinary tract stones are easily combined with urinary tract infections, the infection may not be controlled immediately after the surgical lithotripsy, and thus the inflammatory substances in the urine will continue to stimulate the mucosa of the urethra to produce urinary frequency and urgency symptoms, usually be treated with anti-infective treatment for a period of time after the operation to alleviate the problem. It is recommended that patients who experience urinary frequency and urgency after urinary tract stone surgery inform their treating doctors in a timely manner so that they can determine the cause of the problem and make appropriate interventions in a timely manner.