Which of the following services is prohibited in cosmetology?

Skin tag removal is prohibited in cosmetology because it is considered a medical procedure that should only be performed by licensed medical professionals, such as dermatologists or plastic surgeons. Cosmetologists are trained to provide beauty services, including hair, skin, and nail care, but they do not possess the medical training or licensure required to safely and effectively remove skin tags. Performing such procedures can pose health risks and legal issues for practitioners, which is why it is strictly regulated.

In contrast, services like facial waxing, hair coloring, and nail filing fall within the scope of practice for cosmetologists. These services are non-invasive and are performed using safe techniques and products that is designed for cosmetic enhancement. Therefore, while those services are accepted and regulated within the field of cosmetology, skin tag removal remains outside the legal bounds of practice for cosmetologists.