The growth of a bag on the labia minora may be caused by acute injury, vestibular cyst, vaginitis and other factors. 1. Acute injury: for example, foreign body stimulation, resulting in damage to the labia minora area, which is prone to swelling symptoms, will make the labia minora grow a bag, which may also be accompanied by redness, pain and other symptoms. 2. Vestibular cysts: may be related to infection, overstimulation and other factors, can lead to vestibular gland gland duct blockage, will form vestibular cysts, may also be accompanied by pain, burning sensation and other symptoms. 3. Vaginitis: it may be related to unclean sex and poor hygiene. Inflammatory substances cause irritation to the labia minora area, which can lead to a bag on the labia minora, which may be accompanied by itching and increased vaginal secretions. If a bag grows on the labia minora and there are other abnormal manifestations, it is recommended to consult a doctor for examination and treatment in order to avoid continued aggravation of the lesion.