Because women’s body before the onset of menstruation progesterone level is more vigorous, resulting in shedding more cells, prone to vaginal opening itching. In addition to this, if you do not pay attention to vaginal hygiene, resulting in long-term accumulation of secretions in the vaginal opening, due to the stimulation of inflammation will cause infection, so that the vaginal flora environment is out of balance, there will be itching of the vaginal opening. If a woman has the symptom of itchy vaginal opening before menstruation for a long time, it is recommended to go to the hospital for a gynecological examination after the menstrual period to check the local vaginal condition, and if necessary, carry out an internal secretion examination to see if there is inflammation in the vagina. If there is inflammation, you can take anti-inflammatory drugs according to the doctor’s instructions, and you can also take the method of vulvar cleansing to eliminate inflammation, you can utilize the cleansing solution of Gelin to wash. Therefore, it is recommended that women pay attention to vaginal hygiene at the onset of menstruation and during menstruation, and remove vaginal secretions in a timely manner to avoid infection.