A positive urine test in men contains many items that suggest the possible presence of diseases of the urinary tract, but it is necessary to determine exactly what the disease is based on the specific positive results. The possible causes: 1. If the urine test is positive for leukocytes, it suggests that there may be a urinary tract infection, which needs to be confirmed by combining the patient’s symptoms and the results of his urine culture test. 2. If the urine test is positive for nitrite or leukocyte esterase, it also suggests that there may be a urinary tract infection, which needs to be further confirmed by urine culture test. 3. If the urine is positive for red blood cells, the urinary tract is considered to have a bleeding disorder, and the patient’s symptoms need to be combined to determine the site of the bleeding. Ultrasound examination of the urinary system is needed to rule out the cause of the bleeding. 4. If there is positive protein in the urine, it suggests the presence of kidney disease. A kidney function test should be performed, and the patient’s urine volume should be counted and 24-hour urine protein quantification should be performed to further confirm the diagnosis.