The urinary system excretes urine, carrying waste and toxins produced by the body during metabolism, maintaining stability in the body. When the body is healthy, urine is usually clear or pale yellow. When the body has a disease, the urine has white sediment. The condition of urine sediment is caused by many reasons.

Urine crystal testing is often indicated in cases of suspected kidney stones or other metabolic diseases in the body. Early detection of crystals helps increase the effectiveness of kidney stone treatment.