What should be done if a client experiences a reaction to a product?

If a client experiences a reaction to a product, stopping the service and seeking professional help immediately is the most appropriate course of action. This approach prioritizes the client's safety and well-being, as allergic reactions or adverse effects can escalate quickly. By ceasing the service, you prevent further exposure to the product, which could worsen the reaction.

Seeking professional help ensures that the client receives the necessary medical attention, whether that means calling a medical professional or potentially contacting emergency services, depending on the severity of the reaction. This response reflects responsible and ethical practice within the barbering profession, emphasizing the importance of client care.

The other approaches are not conducive to ensuring the client’s safety. Continuing the service would risk exacerbating the reaction, applying more product could complicate the situation, and merely informing the client about the ingredients does not address the immediate need for medical intervention. Therefore, the correct response underscores the barber's obligation to act swiftly and responsibly in the face of a client's adverse reaction.