I used nair hair removal product and it burns when i pee what do i do??? it hurts really bad

Chemical Irritation: The chemicals in Nair are good for removing hair, but the sensitive lining of the labia minora and surfaces of the vaginal opening are not a good place for such chemicals. The burning with peeing may be related to this. Flush the area with large amounts of cool water and if the burning is still present, apply some cortisone cream. If the pain continues more than 24 hours, see your family doctor.