Itchy skin inside the labia minora can be caused by various reasons, including infection, eczema, white vulvar lesions, systemic diseases, etc. A comprehensive analysis based on signs and specific examinations is needed to facilitate cause-specific treatment.1. Infection: Vaginal inflammatory diseases such as trichomoniasis caused by trichomonas infection and mycosis fungoides caused by pseudofilamentous yeast infection can cause itchy skin inside the labia minora, accompanied by abnormal leucorrhea and odor, etc., and also Redness, swelling and fever of the vulva may also occur. Blood cultures can detect the type of pathogenic bacteria. Trichomonas infection can be treated with metronidazole tablets and metronidazole suppositories; Pseudomonas infection can be treated with oral fluconazole and vaginal clotrimazole suppositories; 2. Eczema: inappropriate underwear, sanitary napkins and infections can trigger labia minora eczema, which can be manifested as papules with itching and tingling sensation. It can be first applied with hormonal creams to reduce symptoms and remove triggering factors, and the general symptoms can be relieved; 3. White vulvar lesions: manifested as vulvar itching, and the course of the disease can be aggravated after severe scratching, resulting in hardened and thickened skin. It is mainly treated with corticosteroids, such as fluorine easy ointment, which can generally only slow down the symptoms and make the cure more difficult; 4. Systemic diseases: such as diabetes, when urine sugar is not well controlled, the sugar in urine will continue to stimulate the vulva, leading to itching of the labia minora at the vulva, and glucocorticoids can be used to relieve the symptoms, while actively treating the primary disease and controlling blood sugar. The itchy skin inside the labia minora should not be scratched frequently to prevent skin breakage and secondary infection, medication should be used according to medical advice, daily attention to cleanliness and good hygiene habits.