The different sizes of labia majora are mostly normal physiological phenomena, which may be influenced by genetic factors, but we cannot exclude the possibility that they are caused by long-term chronic stimulation. If the left and right labia majora are congenitally the same in form, but suddenly appearing on one side of the enlargement recently, it is necessary to pay attention to the fact that it may be caused by some diseases. 1, genetic factors: due to the influence of heredity, some people can have the symptoms of different sizes of labia majora, which belong to the normal physiological state of the human body. The normal physiological state, usually the human body will not produce uncomfortable symptoms, and does not require special treatment, so do not worry too much; 2, long-term habits lead to: generally the formation of a large one small labia phenomenon is due to the formation of external long-term chronic stimulation, such as long-term bicycle riding, local friction, extrusion, may appear the size of the labia majora is not the same, can be changed by changing the way of life to alleviate the size of the different The situation. If it only affects the aesthetics and does not affect reproduction or sexual life, no intervention can be made, or labiaplasty and other means can be used to improve the shape of the disparity in size, with attention to avoiding menstruation and pregnancy during surgery; 3. Pathological phenomena: when the size of the labia majora is different, it is important to determine whether the patient has a history of trauma to the pubic area, or to check whether there is swelling, pain, lumps, or local bleeding in the labia majora, etc. Some Inflammatory stimulation can cause such conditions, such as female vaginitis, stimulation of secretion, etc. You can seek medical attention in time to identify the cause, treat the symptoms, and if necessary, do drug sensitivity test and choose suitable antibiotics for treatment. In addition, conditions such as Bartholin’s gland cysts and trauma can also lead to different sizes of labia majora, at which time patients need targeted treatment, such as when Bartholin’s gland cysts are combined with septic infection, Bartholin’s gland cyst stoma surgery is needed to remove the cyst site and treat it thoroughly; if trauma leads to hematoma of labia majora, at which time swelling and bruising treatment is needed, etc. In daily life, we should pay attention to washing the vulva with warm water every day to keep the area clean, and also try to wear some loose cotton underwear to prevent discomfort caused by excessive friction on the labia majora and other undesirable stimuli.