If a pregnant woman has vulvar itching, the following causes should be ruled out clinically: 1. Due to the increase of estrogen after pregnancy, the vaginal mucosa glycogen increases, so it will easily lead to Candida infection and vulvar itching, accompanied by a large amount of bean curd-like discharge. 2. Caused by other pathogenic infections, such as mycoplasma infection, chlamydia infection or trichomonas infection, all may cause The itchy vulva can be caused by other pathogenic infections, such as mycoplasma, chlamydia or trichomoniasis. 3, because when a pregnant woman has gestational diabetes, the stimulation of urine sugar can also cause vulvar itching. 4, if the itching is in the abdomen or other parts of the body, clinically it is necessary to exclude the possibility of cholestasis syndrome, and a blood test of liver function can be done to find out if it is due to this cause.