What should a nail technician do to address a client's allergic reaction?

The appropriate action for a nail technician to take when a client experiences an allergic reaction is to immediately stop the service and cleanse the affected area. This is essential for the client's safety and well-being. By ceasing the service, the nail technician prevents further exposure to the allergen, which could exacerbate the reaction. Cleansing the area helps remove any residual products that may be causing irritation or an allergic response, thus alleviating discomfort and minimizing further complications.

Addressing an allergic reaction promptly shows professionalism and care for the client's health. This response not only helps relieve the current symptoms but also establishes trust between the technician and the client. Being proactive in such situations is crucial, as it can prevent more serious health issues from developing.

Other options fall short because they do not prioritize the client's immediate needs or safety. Continuing the service ignores the potential risk to the client, while applying nail polish to hide the reaction only serves to mask the issue without treating it. Disregarding the reaction unless it worsens could lead to more severe allergic responses, ultimately risking the client's health. Thus, stopping the service and cleansing the area is the best and most responsible approach.