Primer is safe to apply on the skin.

Primer is typically a product designed for use on nails to enhance adhesion between the natural nail and the artificial enhancements or polish applied afterward. While it plays a crucial role in the nail application process, it often contains chemicals that can be irritating or harmful if applied to the skin.

When primer is applied to the skin, it can lead to allergic reactions, skin irritation, or even chemical burns, depending on the formulation and the sensitivity of the individual's skin. Therefore, it is important to keep primer strictly on the nail surface to ensure safety and to achieve the best results in the application process. Using primer on the skin does not provide any beneficial effects and poses risks that are best avoided by following proper application techniques.