The white stuff coming out of the urethra may be a normal physiological phenomenon, or it may be caused by diseases. 1. Physiological phenomenon: for example, after the erection of the penis, there may be residual semen in the urethra, so it will cause the urethra to squeeze out white stuff. 2. Disease: various types of bacteria, trichomonas, mycoplasma, fungi and other pathogenic bacteria infections, resulting in urethritis, prostatitis, seminal vesiculitis and other infectious diseases of the urinary system, will cause the urethral secretion increase, resulting in the urethra to squeeze out of the white stuff, and most of them will also be accompanied by abdominal cramps, frequent urination, urinary urgency and other symptoms. It is recommended to go to the hospital for examination to clarify the cause of the disease, have the disease actively treated, avoid sexual intercourse and other stimuli during the treatment period.