When urination is completed and there is still a feeling of holding urine, the possible causes are: 1. Infection of the urinary system, when infection occurs, the mucous membrane of the urinary system will become congested and edematous, accompanied by changes in sensitivity, and then there can be increased sensitivity, and a small amount of urine can stimulate the will to urinate, so the patient will have a sense of incomplete urination, a feeling of holding urine or frequent urination and other symptoms, and need to repeatedly go to urinate, but each time the amount of urine is not much. And accompanied by urinary urgency, painful urination and other symptoms, need to carry out routine urine examination and urine culture examination to further confirm the diagnosis; 2, when there are chronic irritation factors of the urinary tract, can cause a sense of holding urine after urination, such as bladder stones, urethral stones, bladder tumors and other lesions, at the same time can be accompanied by interruption of urination or meatus hematuria, need to carry out ultrasound examination of the urinary system to exclude the presence of tumors; 3, if it is Men with prostatic hyperplasia can also experience incomplete bladder emptying and result in a feeling of holding urine after urination, because prostatic hyperplasia leads to increased urethral resistance, and the urine in the bladder is partially discharged and partially remains in the body, thus causing a feeling of holding urine. A urological ultrasound and prostate related tests are needed to confirm the diagnosis.