You can use salt water to wash your itchy vulva during pregnancy, but be careful not to use too much salt water concentration, use warm boiled water to rinse, do not use raw water. After 2-3 days of washing with light salt water, if you do not see any effect or if the itching worsens, you need to go to the hospital in time to check the vaginal secretion routine, find the pathogenic bacteria of the infection and choose the appropriate drugs for topical treatment. During pregnancy, due to the hormonal changes in the body, the PH value of the vagina may change, leading to the proliferation of certain pathogenic bacteria, which may cause inflammation of the vagina. In addition, it is necessary to actively treat pathogenic bacteria during pregnancy to avoid retrograde entry into the uterine cavity, causing intrauterine inflammation, leading to premature rupture of fetal membranes and premature birth, which endangers the life of the fetus.