夜间憋尿:冬天夜长,有些人就寝后因怕冷而长时间憋尿。这样对人体是有害的。尿液中含有尿素、尿酸及各种有毒代谢物质,尿液在体内积存时间过长,这些有毒物质对机体就可能产生有害影响,并可能引起膀胱炎和尿道炎。经常憋尿,还可能导致尿痛、尿血和漏尿现象的出现。尤其是女性,因其尿道短而宽,尿道括约肌功能较弱。此外,膀胱与输尿管交界部位“活瓣”作用也弱,憋尿会使膀胱内尿液聚 Holding back urine at night: winter night long, some people sleep for fear of cold and holding back urine for a long time. This is harmful to the human body. Urine contains urea, uric acid and a variety of toxic metabolites, urine accumulation in the body for too long, these toxic substances on the body may have a detrimental effect, and may cause cystitis and urethritis. Often holding back urine, but also may lead to dysuria, hematuria and leakage of urine appear. Especially women, because of their urethra is short and wide, urethral sphincter function is weak. In addition, the role of bladder and ureter junction “valve” is also weak, holding back urine will make urinary bladder