The possible reasons for urine coming out when you exert yourself: 1. There may be urinary retention, which is caused by more reasons, such as prostatic hyperplasia in men or caused by urethral stricture, can occur. The large amount of urine retained in the bladder puts the pressure of the bladder higher, and when the bladder pressure rises suddenly during exertion and exceeds the closing pressure of the urethra, urine can be involuntarily discharged. It is recommended to go to the hospital for an ultrasound examination of the urinary system and an ultrasound examination of residual urine to further confirm the diagnosis of urinary retention.2. Women commonly suffer from pelvic floor muscle relaxation, such as multiple births or having had uterine surgery or rectal surgery, which can cause pelvic floor muscle relaxation and cause the bladder to move down the urethra. In the process of exertion the bladder pressure suddenly rises, there will be involuntary out of urine, it is recommended to carry out the relevant examination of the pelvic floor and function, and to carry out urodynamic examination to further confirm the diagnosis.