Minimally invasive surgery for bladder stones is primarily performed through the urethra, using a laser lithotripsy technique. During the surgery, anesthesia is administered, so the patient does not feel any pain. After the surgery, once the anesthesia has metabolized, the patient generally does not experience intense pain. Since the minimally invasive surgery does not involve any abdominal incisions, the patient only needs a catheter to help with urination, which generally does not cause pain.