The causes of labia minora enlargement can be divided into physiological and pathological factors; physiological refers to congenital development problems, while pathological factors include stimulation by friction, trauma, infection and mosquito bites, and treatment methods need to be selected according to the specific situation.1. Physiological factors: The level of estrogen rises during female puberty, stimulating the normal development of labia minora, but the result of development varies from person to person. The normal width of labia minora is within 2cm, and some women can have enlarged labia minora, even beyond labia majora, which do not need to be treated if there are no uncomfortable symptoms. However, overly enlarged labia minora may cause various problems, such as painful walking friction, sexual intercourse disorder, recurrent vaginal inflammation, etc., which require surgical correction; 2. Pathological factors: frequent sexual intercourse, masturbation, and stimulation such as wearing unsuitable underwear and walking friction can cause continuous redness, swelling and pain in labia minora, and then hyperplasia and enlargement, which require improvement of lifestyle, replacement of suitable clothing and supplies, etc., and generally do not require Special treatment is not needed. If the enlarged labia minora cannot subside and affects life, surgery is needed. Vaginitis, vulvodynia, urethritis, etc. cause redness, swelling and pain in labia minora, accompanied by other symptoms such as fever, abnormal leucorrhea, odor, vulvar itching and painful urination, etc. Antibiotics should be applied to treat the initial inflammation, and generally the inflammation disappears and labia minora can be restored. If permanent hypertrophy of labia minora can be caused under long-term inflammation stimulation, surgery is needed. It should be noted that if labia minora enlargement surgery is performed, rest in a flat position can be taken after surgery to reduce postoperative edema and pain.