Leukocytes 1+ in urine is a small number of leukocytes in the urine. It is common in pyelonephritis, cystitis, prostatitis, urine contamination and other causes. 1. Pyelonephritis: Since pathogenic bacteria cause inflammation of the renal pelvis and renal parenchyma, there will be an increase in the number of bacteria in the urinary system, and leukocytes will appear in the urine produced accordingly. 2. Cystitis: cystitis caused by bacterial infection, so in the diseased area will gather a large number of leukocytes phagocytosis of pathogenic bacteria, in the apoptosis of leukocytes will be discharged in the urine leukocytes. 3. Prostatitis: when men suffer from bacterial chronic prostatitis, leukocytes can also be found in the urine examination, often accompanied by urinary abnormalities, such as frequent urination, incomplete urination, waiting for urine, abdominal pain and other symptoms. 4. Urine contamination: patients in the collection of urine specimens in contact with infected vaginal secretions can be contaminated urine specimens, and then affect the results of the examination, resulting in urine leukocytes 1 + performance. If you find leukocytes 1+ in the urine, you need to go to the regular hospital in time to check the specific cause and treatment, so as not to delay the condition.