What should a barber do if they encounter an allergic reaction during a service?

In the event of an allergic reaction during a service, the most appropriate action is to stop the service and consult medical assistance. This response is crucial for the safety and well-being of the client, as allergic reactions can range from mild to severe, including symptoms like swelling, hives, or even anaphylaxis.

Stopping the service immediately allows for appropriate care to be administered without further aggravating the client's condition. Seeking medical assistance ensures that the client receives the necessary treatment for their reaction, which may involve medications like antihistamines or, in severe cases, emergency interventions.

Continuing with the service or trying a different product could escalate the situation, potentially leading to increased discomfort or serious health risks. Applying ice could provide temporary relief for localized symptoms but would not address the underlying allergic reaction and may delay proper medical attention. Therefore, prioritizing health and safety by ending the service and getting professional help is the correct course of action in such situations.