Women with vulvar and vaginal itching after pregnancy consider three main causes and do treatment for specific reasons. First, the patient’s physiological leucorrhea increases, and the excessive leucorrhea stimulates the vulva and causes slight itching. In this case, patients only need to change their underwear regularly and wash their vulva frequently, no special treatment is needed. Second, the patient may have vaginal inflammation that causes itching. Patients need to do gynecological internal examination and leuko-lab tests to determine the type of inflammation before choosing appropriate antibiotics and local vaginal plugs or topical application to stop the itching. Thirdly, the patient may be allergic to the underwear and toilet paper used, leading to itching. It is necessary to find the allergen, remove the allergen, and then use dexamethasone ointment as an anti-allergy to treat the itching.