What should a cosmetologist do if a client shows signs of an allergic reaction during a service?

A cosmetologist should discontinue the service immediately and provide medical assistance if necessary when a client shows signs of an allergic reaction. This is the correct approach because the health and safety of the client are paramount. Continuing the service can exacerbate the reaction, potentially leading to more severe consequences for the client's health.

In cases of allergic reactions, it’s essential to act quickly and decisively. By stopping the service, the cosmetologist eliminates further exposure to the allergen, which is crucial in preventing the situation from worsening. Moreover, assessing whether medical assistance is needed ensures that the client receives appropriate care if their reaction is severe, such as experiencing difficulty breathing or swelling.

This approach aligns with the professionalism and duty of care expected from a licensed cosmetologist in the industry. Effective response to such situations is vital not only for the welfare of the client but also for maintaining trust in the practitioner-client relationship.