What is the cause of female pruritus vulvae?

The vulva pruritus is a common symptom of female friends, life also have a lot of friends were troubled by the disease, but a lot of friends in an examination and treatment, but for the cause of female vulva pruritus is very confused, also bring a lot of inconvenience for future treatment. Therefore, a correct understanding of the problem is necessary.
First, sexual diseases
Because the body lacks vitamins, or is itself suffering from anemia, jaundice and other diseases, is also a cause of genital itching in women is an important part. For example, long-term suffering from diabetes, diabetes due to long-term stimulation of the vulva; or obese people, due to excessive secretion of sebaceous glands and sweat glands, and thus stimulate the vulva, it will cause the disease.
Two infectious diseases

As a result of Trichomonas infection or mold and other factors, leading to women suffering from gynecological diseases, resulting in significant increase in leucorrhea, inflammatory secretions, long-term stimulation of the vulva's skin and mucous membranes, and then cause itching. In addition, if you suffer from certain sexually transmitted diseases, it may cause the symptoms.
Three. Other factors
Due to long-term wear of chemical fiber underwear, or the use of substandard sanitary products, as well as systemic or genital areas such as allergies, may become the cause of female genital itching. At the same time, the pregnancy causes the vulva to be congested, as well as the Yin local pathological change, or is because the menstrual blood flows through the vagina, interferes with the normal vagina acid-base balance, also may cause the genitals discomfort.
For the cause of vulva itch I believe we have a certain understanding, if life once found himself suffering from the disease, must choose the regular outpatient treatment actively, strive for the early cure.