Red, swollen and itchy labia may be caused by vaginitis, sexual stimulation, traumatic stimulation, allergies, etc. Sometimes the symptoms are mild and can be relieved by warm water washing, if necessary, oral or topical medication is needed. 1. Vaginal inflammation: including bacterial vaginitis, mycobacterial vaginitis and trichomoniasis, the typical symptoms of vaginitis are increased discharge, vulvar itching and prolonged infection stimulating the labia, resulting in labia Redness and itching. It is recommended to go to the hospital in time to perform gynecological examination and routine examination of the white belt to determine the type of vaginal inflammation and to select drugs for causal treatment. 2. Sexual stimulation: Frequent sexual intercourse or first sexual intercourse causes local infection or redness and swelling, resulting in red, swollen and itchy labia. You need to pay attention to rest, keep your vulva clean, and treat with topical anti-inflammatory drugs if necessary; 3. Allergy: some women are allergic to pads and chemical fiber underwear, which may cause redness, swelling and itching of the labia and other allergic manifestations after use, so you can use antihistamines for anti-allergy treatment, and avoid using such pads or underwear again to reduce local stimulation and choose loose, cotton, breathable underwear. Do not scratch the red, swollen and itchy labia, you can use warm water for washing or diluted potassium permanganate bath to reduce the itchy symptoms and treat the cause after clarifying the cause. If you have a history of unclean sexual life, you need to exclude sexually transmitted diseases.