What is the recommended action if a client shows signs of allergic reaction during a treatment?

When a client shows signs of an allergic reaction during a treatment, the recommended action is to stop the treatment and seek assistance. This is crucial because allergic reactions can escalate quickly and may pose serious health risks to the client. By stopping the treatment, the professional can prevent further exposure to the allergen and mitigate potential harm. Seeking assistance, whether from a supervisor, a medical professional, or emergency services, ensures that the client receives appropriate care and management, which is essential for their safety and well-being.

The other options might seem like quick fixes but could lead to increased risk. Continuing the treatment ignores the potential severity of the allergic reaction, applying extra product might exacerbate the situation, and ignoring the signs altogether can result in severe consequences for the client's health. Therefore, promptly stopping the treatment and seeking help is the most responsible and professional response.