Willow oak infusion capsule is unable to dissolve urinary stones, it is a pharmaceutical preparation with an extract of an evergreen plant of the genus Quercus as the main ingredient, the main component of which is a large amount of ellagic acid substances. Willow oak extract capsule has an inhibitory effect on the inflammation of the ureteral mucosa, and at the same time has the effect of relaxing the smooth muscle of the upper urinary tract, so it can promote the discharge of stones and prevent the recurrence of stones. It is effective in the treatment of kidney and ureteral stones smaller than 1cm. If the stones are still not discharged after 4 weeks of use, it is recommended to take other treatments as early as possible.