The color of urine is not usually affected before or after menstruation. Menstruation and urine are not excreted by the same organ; menstruation is produced from the uterus and passes out of the body through the vagina, while urine is produced by the kidneys and passes out of the body through the bladder and urethra, and the two do not affect each other. Neither before nor after menstruation affects the urine and does not cause the color of the urine to change. If the color of urine before or after menstruation is somewhat yellowish, or the color is thicker, you should be alert to the urinary system due to inflammatory infections, such as urethritis, cystitis, etc.; such as no urinary pain, urinary frequency, urinary urgency and other symptoms, but also may be usually drink too little water, resulting in increased concentration of urine due to. If you have doubts about the color of your urination, you should seek prompt medical attention and go to the hospital for routine urine examination. Urine specimens are easily contaminated during menstruation, and there is a bias in analyzing whether there are red blood cells in the urine and so on, which can be examined after the end of menstruation.