The term ‘overexposure’ relates to the situation when any individual is overexposed to any nail product (or, indeed, any other ingredient in any product). The level of overexposure is specific to each individual and no one knows what that is. Overexposure will result in an allergic reaction to an allergen. Nail coating products are NOT meant to touch the skin. Nail coatings that are not ‘properly cured’ will also cause an overeposed allergy.