The possible causes of white liquid after urination are urethritis and prostatitis, as follows: 1. Urethritis: the urethra closes after urination, squeezing the urethra can appear with white purulent discharge, accompanied by pain in the urethra or urinary frequency, urinary urgency and other symptoms, can also be accompanied by abnormal odor, etc., need to carry out routine laboratory tests of urine or culture of secretions to further confirm the diagnosis of the presence of infection; 2, The actual prostatitis: seen in men, in the end of urination or the initial urination can be seen white, sticky, clear-like liquid, mostly prostatic fluid, in the process of urination when the prostate is squeezed, prostatic fluid secretion increased, there can be urethral secretion related to the white liquid, also known as white drip phenomenon. It is possible to be accompanied by symptoms such as perineal distention, frequent urination, urinary urgency, etc. It is necessary to carry out a prostate ultrasound examination or a routine prostate fluid examination or prostate fluid culture examination to further confirm the diagnosis.