Urinary bifurcation includes physiological and pathological causes. Urinary bifurcation occurs after sex or during erection and is caused by increased secretion of the urethral glands, which is a normal physiological phenomenon. Pathological causes include urethral stones, prostatitis, benign prostatic hyperplasia, urethral cysts, urethritis, etc. The old people are commonly affected by benign prostatic hyperplasia, which is due to the increase in the size of the prostate gland, causing bladder outlet obstruction to form urinary bifurcation, mostly accompanied by difficulty in urination, which requires oral treatment of prostatic hyperplasia drugs or surgical treatment. Young men are most commonly treated for conditions such as urethritis and chronic prostatitis with the use of sensitive antibiotics and plenty of water to flush the urethra. Urethral stones can cause urinary bifurcation, most of which can resolve on their own after stone removal. Urethral cysts produce symptoms of urinary bifurcation due to urethral obstruction. Urethral strictures due to trauma or medical injury can also cause urinary bifurcation. In summary, the occasional bifurcation of urine is mostly a physiological factor, commonly after ejaculation or during the sexual impulse state. The regular bifurcation of urine should be alert to the occurrence of disease, timely medical consultation, clear diagnosis and symptomatic treatment.