Why is it often itchy on both sides of the genitalia?

Patient's question:

Duration of onset and persistence: Already for several years
Current general condition: Itchy when hot. The moment it itches, the urge to scratch comes over me``
Medical history: Had a sexually transmitted disease, but it has been a long time since the last recurrence
Other: Itchy on both sides of the genitals, specifically the inner thighs. The moment it itches, the urge to scratch comes over me. Is there any way to solve this?

Doctor's answer:

Hello, pruritus itself is not a disease but a symptom. There are many causes that can lead to vulvar itching, such as frequent friction and irritation, or conditions like hemorrhoids, intestinal pinworms, diabetes, and neurosis, which may all be primary causes triggering vulvar itching.
The severity of vulvar itching varies among patients. Mild cases involve itching that is bearable, while severe cases can lead to insomnia due to the discomfort. Due to the sensitive location of the itching, it often causes significant embarrassment, affecting social interactions and work. Repeated scratching of the itchy area can result in numerous linear or punctate scratch marks, blood crusts, and may cause hyperpigmentation and lichenification. In some cases, secondary bacterial infections may occur, leading to complications such as folliculitis, scabies, and lymphadenitis.
When suffering from vulvar itching, the first step should be to actively treat the underlying conditions such as intestinal parasites, diabetes, and neurosis. Additionally, antihistamines like chlorpheniramine and vitamin C can be taken orally. Topical treatments may include a 0.5% menthol powder and glycerin lotion, 2% camphor ointment, or 2% carbolic ointment. For dry skin, a 15% urea ointment can be used, and for lichenified skin, corticosteroid ointments are recommended.
In traditional Chinese medicine, vulvar itching is believed to be caused by liver and kidney deficiency or imbalances in the Chong and Ren meridians. Appropriate herbal formulas can be selected based on the specific condition. Locally, a decoction of 30 grams each of Sophora flavescens and Polygonum aviculare can be used for rinsing. Taking a mineral bath can also help accelerate recovery.