The diseases that can be detected by urine examination are: 1. Infectious diseases, if there is an infection in the urinary tract there will be an increase in the number of white blood cells, or an increase in the number of bacteria, etc., which can be detected by urine examination. 2. If there is a bleeding disease in the urinary system, it can also be detected by urine examination, when the number of red blood cells in the urine specimen will be significantly higher, further auxiliary other ultrasound examination is needed to determine the specific site of bleeding or the cause of bleeding. 3. 3. You can find out the elevated sugar content in the urine to determine whether the patient has diabetes. If the urine is high in sugar, further blood glucose testing is needed to confirm the diagnosis of diabetes. 4. The presence of elevated bilirubin levels can also be detected to determine whether the patient is suffering from jaundice. 5. The routine urine examination can also be used to understand the pH of the human body, through the pH of urine to initially infer whether the pH of human body fluids is at a normal level and whether there is a disorder of acid-base metabolism.