Vulvar itching may be caused by vaginitis, cervicitis, etc. During menstruation, menstrual blood will play a flushing role, making the symptoms of vulvar itching reduced. There are many causes of vulvar itching, it may be vaginitis, cervicitis and other diseases, these gynecological diseases will lead to local mucous membrane and skin irritation, resulting in itching, during menstruation, menstrual blood outflow, will be local bacteria and other flushing, so as to make the vulvar itching symptoms reduced. In addition, if a woman has dysmenorrhea, because the pain is more serious, it may cover up the symptoms of vulvar itching, which leads to a relative lack of itching. If women usually have symptoms of vulvar itching, it is recommended to go to the hospital for examination to clarify the cause of vulvar itching, and scientific treatment under the guidance of the doctor.