Kidney crystals can usually be excreted in about 2 weeks by drinking more water every day, but this cannot be generalized. Kidney crystals are the precursors of kidney stones, which are urine deposits that appear inside the kidney calyces and form crystalline substances. By drinking more water and doing more jumping movements, the discharge of kidney crystals can be promoted, which usually takes about 2 weeks. If some small stones appear, they can also be expelled along with them. It is recommended to drink about 2500ml of water per day, and you can also take some medicines to promote the discharge of kidney crystals and kidney stones, such as stone pass and stone removal granules. However, the exact time of kidney crystals discharge varies from person to person, and there is no fixed standard. Once they are found, it is necessary to pay attention to regular review and monitoring of kidney crystals discharge through urological ultrasound and other examination programs. After the kidney crystals are discharged, it is important to pay attention to the adjustment of daily living habits, drink more water, exercise more, and eat less high-protein, high-sugar, and high-fat food to reduce the chance of stone recurrence.