When a woman has a sudden lump on her vulva, the specific cause of the lump should be determined based on its location and the size of the lump and accompanying symptoms. If the lumps are localized in the labia majora, or the clitoris, and are accompanied by redness, swelling, pain, etc., the cause of the lumps is determined by the location, size and accompanying symptoms. If you are not paying attention to hygiene and the bacterial local infection causes folliculitis, you only need to apply povidone iodine solution and treat it with erythromycin ointment. However, if the lump is growing on the inner lower side of the labia minora, there is also obvious pain, and even see the outflow of pus, it is considered to be caused by abscess of the vestibular gland.