What signifies the potential movement of a kidney stone through the urinary tract?

The migration of pain is a key indicator of the potential movement of a kidney stone through the urinary tract. As a kidney stone travels from the kidney down to the bladder, it can cause pain that shifts location. This pain, often described as renal colic, typically starts in the flank and may radiate towards the lower abdomen or groin, reflecting the stone's movement through the urinary system. The nature of this pain is acute and can vary in intensity, depending on the stone's size and position, as well as the level of obstruction caused in the urinary tract.

Other options may relate to kidney function or the urinary system but do not directly indicate the movement of a kidney stone. Less frequent urination might suggest an obstruction but does not capture the dynamic process of a stone moving. Increased thirst is a common symptom associated with dehydration or kidney issues, rather than directly tied to the stone's movement. Color change in urine can indicate various conditions or changes in hydration status but does not provide specific information regarding the stone's movement itself.