If you have a clear mucus after urinating, then the possible causes: 1, prostatitis, if a man suffers from prostatitis, there can be increased secretion of prostatic fluid, then after forceful defecation, there can be white sticky clear-like material in the urethra, usually suffering from perineal distention, discomfort or accompanied by pain in the urethra, etc. It is recommended to carry out routine examination of prostatic fluid and culture examination to clarify whether it is suffering from prostatitis. 2, non-gonococcal urethritis, can appear in the urethra thin white or yellow mucus-like material, accompanied by pain in the urethra, itching in the urethra, burning in the urethra and other symptoms, mostly through unclean sexual contact led to infection, a history of sexual contact, if the corresponding symptoms, it is recommended to retain the secretion, for mycoplasma, chlamydia related testing. If the presence of mycoplasma and chlamydia is diagnosed, medication is required and sexual intercourse should be abstained from during treatment to avoid transmission to sexual partners.