Wearing underwear allergy vulvar itching, first of all should be detached from the allergen, the symptoms do not relieve can be anti-allergy and symptomatic treatment. 1. Disengage from the allergen, avoid wearing the allergic underwear and panties again, and remove the allergen by localized rinsing with warm boiled water. 2. Anti-allergy treatment, after the allergen is removed from the symptoms are still obvious, can be appropriate oral second-generation H1 antihistamines, such as cetirizine, loratadine and so on. 3. Symptomatic treatment, itching, edema is more obvious, local can also use glucocorticoids, such as hydrocortisone acetate, hydrocortisone butyrate, etc., this kind of drugs have anti-inflammatory, immunosuppressive and other effects, can relieve the local symptoms caused by allergies. Medications need to be used under medical supervision. Second-generation H1 antihistamines may cause mild drowsiness, fatigue and other discomforts, and should be used with caution in pregnant and lactating women as well as those with hepatic or renal impairment; long-term use of topical glucocorticosteroids can cause skin atrophy, capillary dilatation, and pigmentation abnormality, and so on, and so should not be used in a long-term, large-area manner. During the period of allergy, pay attention to the diet of light, temporary contraindication of sexual life, avoid violent scratching, so as not to induce infection.