What can cause mold to form under artificial nails?

Mold formation under artificial nails is typically caused by moisture that gets trapped between the artificial nail and the natural nail, particularly at the free edge. This moisture can create an environment conducive to mold growth, as molds thrive in damp, warm, and dark environments. When moisture seeps in, it not only promotes mold but can also lead to lifting of the nail, further exacerbating the issue.

While factors such as excessive heat can influence the overall health of nails and the adhesive used, they do not directly cause mold to form. Low-quality materials might increase the risk of problems, but they are not the primary factor leading to mold in this specific context. Lack of moisture is contrary to the conditions needed for mold growth, as mold generally requires a certain level of humidity to thrive. Therefore, it is the presence of moisture trapped within the artificial nail that is the most critical factor in mold development.