hi. noted history of stinging sensation on labia majora. did you recently shave the area or any application of chemical or lotion? are there any other associated symptom that goes with it such as itchiness or abnormal discharge? things that must be considered are folliculitis, vaginosis, hypersensitivity reaction and other dermatologic concerns (such as dermatitis). it is best if you consult with a doctor, preferably a gynecologist, for physical examination and clinical evaluation. diagnostics and management will be directed accordingly. hope this helps. good day!! ~dr.kaye