If the boy always appears to be unable to urinate, consider the possibility of urinary tract infection is relatively large, you need to check the routine urine examination to see if there are white blood cells, or a positive urine occult blood test. If there is, it can be considered a urinary tract infection, or a stone tuberculosis, etc. In this case, it is necessary to do further ultrasound of the urinary system to see if there are stones, and at the same time, you can use some anti-infection or hemostatic drugs. In addition, you must pay attention to the observation, and after a week of treatment, you need to review the treatment, and during the process of urine retention, you must pay attention not to let the specimen become infected. You must pay attention to let the child rest more, do not stay up late, diet should be light and easy to digest, do not eat spicy and acidic food. In addition is not to eat eggs, or beef, appropriate supplement some vegetables, or water. In this case, be sure to regularly check the urine, to observe, there is no abnormal urine, such as abnormal color of urine, or frequent urine, the daily amount should be recorded. If this situation still occurs, you must go to the hospital and improve some relevant tests to clarify the diagnosis.