If you take a bath every night and your vulva is still itchy, you should consider that it is caused by vulvovaginitis, vaginitis, drug allergy or chemical irritation. 1. Vulvovaginitis, vaginitis: If there is a microbial infection of the vulva or vagina, such as Candida or Trichomonas infection, resulting in vulvar itching, this is usually not cleaned off. Also or have vulvar parasitic diseases such as pubic lice, pinworms, scabies and so on, can also lead to have itching. 2. Drug allergy: if the patient is taking oral medication to treat other related diseases if there is drug allergy phenomenon, will also occur with itching. 3. Chemical stimulation: if long-term local use of some topical care products or topical cleaning products, etc., then it is easy to lead to irritation caused by vulvar itching. It is recommended that friends with vulvar itching, go to the hospital in a timely manner to improve the relevant auxiliary examination, to clarify the cause of the disease, to avoid delaying the condition.