The severity of a pimple at the vaginal opening depends on the condition of the pimple. For example, if the pimple is similar to a soybean, small, and there is only localized redness, you can go to a pharmacy and buy a lotion for treatment, such as gynecologic cleansing or yellow bitter lotion, and take a sitz bath in a tub of 1:10 water for 15 minutes, then apply iodophor and erythromycin ointment, and the pimple will subside in about 7 days. It is possible that this is caused by inflammatory irritation or inflammation of hair follicles, and is not serious. However, when the pimples at the vaginal opening are large and have caused swelling of the entire vulva, making it difficult to walk, there is a chance of a vestibular gland cyst occurring, which is more serious. It is recommended to go to the hospital to register for a gynecological examination and then decide whether to treat it by means of oral medication or by means of surgery, depending on the situation.