The causes of itching with redness, swelling and pain on both sides of the outer lips of women include allergy, vaginitis, trauma, eczema, etc., and the medication includes anti-allergy drugs, anti-bacterial drugs, anti-fungal drugs and hormones. 1. Allergy: If the allergy to underwear triggered by the phenomenon of itching with redness, swelling and pain on both sides of the lips of women, this time you can give oral loratadine, skin itching particles to treat. 2. Vaginitis: If the vaginal inflammation is caused by bacteria, fungi, etc., then you need to give levofloxacin, fluconazole and other drugs for antibacterial treatment. 3. Trauma: If the redness, swelling and pain are caused by external injuries, it is necessary to apply povidone-iodine for sterilization. 4. Eczema: If the redness, swelling and itching are caused by vulvar eczema, hydrocortisone, halometasone and other drugs can be given to anti-inflammatory treatment. Finally, the phenomenon of itching with redness, swelling and pain on both sides of the lips of women should consult a doctor in a timely manner, and all medications should be used according to the doctor’s instructions, do not self-medication.