The normal urine will have a little foam, but not too much. 3, urinary tract infection, inflammation, such as cystitis, urethritis, prostatitis and other conditions, will also lead to lower urine tension, resulting in foam. 4, urine containing semen or prostate fluid, after intercourse in the same room, due to the components of semen contained in the urethra, the process of urination will reduce the urine tension, foam, some patients may also be found in the urine flocculent. When the patient encounters sexual stimulation, such as gender contact, the urethra will be filled with prostatic fluid, and urinating in this situation will result in foamy urine.