How does a hangnail form?

A hangnail forms when the skin near the nail tears or splits. This condition typically occurs in the area where the nail meets the skin, often as a result of dryness, trauma, or irritation to the sensitive skin around the nail bed. Factors such as washing hands frequently, exposure to harsh chemicals, or even dry weather can contribute to this tearing.

While nail polish application, excessive nail filing, and nail biting might cause various nail-related issues, they do not directly result in the formation of hangnails. Nail polish could actually protect the nail and surrounding skin, excessive filing focuses on the nail itself rather than the skin, and nail biting primarily affects the nail structure rather than causing a split or tear in the surrounding skin. Thus, the key factor in hangnail formation is indeed the tearing or splitting of skin near the nail.