Normal urine is clear and transparent in appearance. Urine contains a large number of metabolic products, especially salts, including urates, carbonates and phosphates. When urine is first discharged, the salts are dissolved in the urine and are not visible. As the water in the urine evaporates, the salts become oversaturated and are discharged from the urine, where they are deposited at the bottom of the urine and appear as white sediment. It is a normal phenomenon that the urine becomes a white powder when it dries. Patients do not have uncomfortable symptoms, so there is no need to do special treatment for this condition, just pay attention to drink more water and urinate regularly to dilute the urine.