What should a barber do first when encountering a product allergy in a client?

When a barber encounters a product allergy in a client, the most appropriate action is to immediately stop the service and assess the situation. This approach prioritizes the client's safety and well-being. Allergic reactions can vary in severity, and it is crucial to respond promptly to minimize potential harm. Stopping the service allows the barber to evaluate the client’s condition, assess the reaction’s severity, and determine the necessary steps to address the allergy, such as seeking medical assistance if deemed necessary.

Continuing with the service after a patch test can lead to further irritation or exacerbation of the allergic reaction, which is why it’s vital to halt any ongoing procedures immediately. Informing the client about the hair products used is important but comes after the initial assessment of the allergic reaction. Applying a soothing cream may be beneficial in some cases, but it should only be done after assessing the situation and ensuring that the type of cream used is safe and appropriate given the allergy.